Federal Aviation Administration--Authority to Auction Airport Arrival and Departure Slots and to Retain and Use Auction Proceeds
B-316796, Sep 30, 2008
This responds to a Congressional request for our legal opinion regarding the authority of the Federal Aviation Administration (FAA) to auction airport arrival and departure slots. As part of its efforts to reduce congestion in the national airspace, in April and May 2008, FAA issued proposed regulations to conduct such auctions at three New York-area airports--LaGuardia Airport (LaGuardia), John F. Kennedy International Airport (JFK), and Newark Liberty International Airport (Newark)--at some time in the future. In August 2008, FAA announced that it was proceeding to auction two specific slots at Newark on September 3, an action that has since been administratively stayed. On September 16, 2008, FAA announced that "[i]n accordance with rulemaking activity that is not yet complete" and "if the rule is adopted," it may auction slots at Newark, LaGuardia, and JFK starting on January 12, 2009. As agreed with your staff, this opinion addresses whether FAA has authority to auction slots and if it does, whether it may retain and use funds obtained through such auctions.
We conclude that FAA currently lacks authority to auction arrival and departure slots, and thus also lacks authority to retain and use auction proceeds. For the first time since it began regulating U.S. navigable airspace nearly 40 years ago, FAA now asserts that it may assign the use of that airspace using its general property management authority. According to FAA, slots are intangible "property" that it "constructs," owns, and may "lease" for "adequate compensation" under 49 U.S.C. 106 (l)(6) and (n) and 40110(a)(2). An examination of those statutes read as a whole, however, makes clear that Congress was using the term "property" to refer to traditional forms of property. It was not referring to FAA's regulatory authority to assign airspace slots, no matter how valuable those slots may be in the hands of the regulated community. Related case law confirms our conclusion. The only other source of authority for FAA to raise funds in connection with its slot assignments is the Independent Offices Appropriations Act (IOAA), 31 U.S.C. 9701, commonly referred to as the "user fee statute," but that authority is currently unavailable. Since 1998, Congress has, through annual appropriations restrictions, specifically prohibited FAA from imposing "new aviation user fees," and we conclude that proceeds from FAA's proposed auctions would constitute such a fee. Accordingly, in our opinion, FAA lacks a legal basis to go forward with the Newark auction or any other auction, and if FAA were to go forward with auctioning slots without obtaining the necessary authority and retained and used the proceeds, GAO would raise exceptions under its account settlement authority for violations of the "purpose statute," 31 U.S.C. 1301(a), and the Antideficiency Act, 31 U.S.C. 1341(a)(1)(A).
B-316796, Federal Aviation Administration--Authority to Auction Airport Arrival and Departure Slots and to Retain and Use Auction Proceeds, September 30, 2008
The Honorable James L. Oberstar
Committee on Transportation and Infrastructure
House of Representatives
The Honorable Patty Murray
Subcommittee on Transportation, Housing, and Urban
Development, and Related Agencies
Committee on Appropriations
The Honorable Christopher S. Bond
Ranking Minority Member
Subcommittee on Transportation, Housing, and Urban
Development, and Related Agencies
Committee on Appropriations
The Honorable Frank R. Lautenberg
The Honorable Robert Menendez
The Honorable Charles E. Schumer
The Honorable Hillary Rodham Clinton
United States Senate
This responds to your request for our legal opinion regarding the authority of the Federal Aviation Administration (FAA) to auction airport arrival and departure slots. As part of its efforts to reduce congestion in the national airspace, in April and May 2008, FAA issued proposed regulations to conduct such auctions at three New York-area airports—
We conclude that FAA currently lacks authority to auction arrival and departure slots, and thus also lacks authority to retain and use auction proceeds. For the first time since it began regulating
FAA's control of congestion in the national airspace by use of a reservation or slot system is not new. What is new is FAA's proposal to assign the slots by auction. FAA first instituted a slot control system nearly 40 years ago, in 1968, in the so-called High Density Rule. See 33 Fed.
In promulgating the High Density Rule, FAA acknowledged that it was acting pursuant to its regulatory authority to ensure the efficient use of the national airspace under sections 307(a) and (c) of the Federal Aviation Act of 1958. 33 Fed. Reg. at 17897, 17898. That act created FAA (as the Federal Aviation Agency) and directed the FAA Administrator to:
assign by rule, regulation, or order the use of the navigable airspace under such terms, conditions, and limitations as he may deem necessary in order to insure the safety of aircraft and the efficient utilization of such airspace. He may modify or revoke such assignment when required by the public interest. . . . [The Administrator also] is authorized to prescribe air traffic rules and regulations governing the flight of aircraft, for the navigation, protection, and identification of aircraft, for the protection of persons and property on the ground, and for the efficient utilization of the navigable airspace . . ..
Federal Aviation Act of 1958, Pub. L. No. 85-726, sections 307(a), (c), 72 Stat. 731, 749-50, 49 U.S.C. sections 1348 (a), (c) (1968) (emphasis added). See generally Northwest Airlines, Inc. v. Goldschmidt, 645 F.2d 1309 (8th Cir. 1981) (upholding 1980 amendment to High Density Rule as exercise of FAA's section 307(a) and (c) authority to regulate efficient use of airspace).
Reservations under the High Density Rule initially were allocated by agreements between the airlines (acting through airport scheduling committees) and ATC and by rule, the vast majority of reservations were set aside for assignment to scheduled air carriers. See 14 C.F.R. sect. 93.123(a) (1969). Because only a few carriers held certificates of public convenience and necessity for these airports, as required prior to deregulation of the airline industry in the early 1980's, there was only limited competition for the reservations. With deregulation, however, any licensed carrier could service any high density airport, with the result that airport scheduling committees could no longer reach agreements acceptable to prospective new entrants and incumbent airlines wishing to expand their operations.
To accommodate the resulting demand for reservations while ensuring continuity of operations for carriers providing regularly scheduled service, FAA amended the High Density Rule effective in 1986. See 50 Fed. Reg. 52180 (
In issuing the 1986 amendments, FAA noted that it had decided not to pursue a proposal it had made in 1980, to assign slots by means of an auction. It explained this was because legislation would be required for the collection and disposition of the proceeds.
Over time, Congress became concerned that the High Density Rule, particularly the 1986 amendments, hurt competition, unfairly favored incumbent airlines, and was not the best means to reduce congestion. After enacting several measures in the 1980's and 1990's requiring greater access for certain service providers, in 2000, Congress directed FAA to phase out the High Density Rule altogether, at LaGuardia, JFK, and O'Hare, no later than January 1, 2007. At about this same time, Congress also began to enact annual appropriations restrictions prohibiting FAA from promulgating any new aviation user fees unless specifically authorized by statute. The first of these restrictions was enacted in 1997 for fiscal year 1998, and the most recent was enacted in 2007 for fiscal year 2008.
As the 2007 High Density Rule phase-out deadline approached, FAA remained concerned about congestion. In August 2006, it therefore proposed to continue caps on hourly arrivals and departures at LaGuardia and to assign the majority of slots (now called operating authorizations) to incumbent carriers. 71 Fed. Reg. 51360 (
[FAA] will seek authority to utilize market-based mechanisms at LaGuardia in the future [to allocate capacity]. Such legislation would be necessary to employ market-based approaches such as auctions or congestion pricing at LaGuardia because the FAA currently does not have the statutory authority to assess market-clearing charges for a landing or departure authorization. If Congress approves the use of market-based mechanisms as we plan to propose, a new rulemaking would be necessary to implement such measures at LaGuardia.
Finally, as noted above, in April and May 2008, FAA issued its most recent proposals for a cap and slot system at LaGuardia, JFK, and
Whether FAA may raise funds in connection with its assignment of slots—by holding a slot auction, imposing a user fee, assessing a tax, or by some other mechanism—depends on whether it has the proper statutory authority. Congress has granted FAA explicit statutory authority to collect fees in several different situations, but no explicit authority exists for the imposition of fees related to the assignment of slots. We therefore look to whether FAA has any other authority that would permit it to auction slots.
In evaluating whether FAA may assign slots using its general property disposition authority, it is important to understand what a slot is. FAA has consistently characterized a slot as an operating authorization or operational authority to conduct one operation (arrival or departure) in the airspace during a specified time period. At the five high density airports, this authorization is in addition to the authorization—or clearance—that must be obtained from ATC to operate within the airspace at those facilities. 14 C.F.R. sections 91.131(a)(1), 91.173. While these two authorizations differ in some respects—clearances are normally required of all users of this airspace, while slots, due to capacity demands, are issued only to some users—both constitute regulatory permission without which aircraft may not be operated. So understood, a slot is a regulatory license—a legal permission, revocable by FAA, to conduct an act that otherwise would not be permitted.
As FAA itself emphasizes, it is also important to understand that caps and slots are two interconnected parts of FAA's regulatory structure to ensure the efficient use of the airspace. 2008 FAA Letter at 1. Limiting aircraft traffic by capping the number of arrivals and departures reduces the amount of traffic that is airborne, but it does not avoid the backup of aircraft seeking access to the air traffic system or provide a mechanism for prioritizing traffic. Assigning slots accomplishes this objective; without slots, traffic will queue on a first-come-first-served basis (as it does at non-slot controlled airports), undermining scheduling. Whether the assignment system is called a reservation system, an operating authorization system, or a slot system, the use of an assignment mechanism is key to accomplishing what FAA believes is necessary to promote orderly and efficient traffic flow and use of airspace.
According to FAA, however, slots are not a license but property that it acquires or constructs and, as the property owner, may lease using its general property disposition and contracting authority in 49 U.S.C. sections 106 (l)(6) and (n) and 40110(a)(2). Section 106(n)(1) authorizes FAA:
(A) to acquire (by purchase, lease, condemnation, or otherwise), construct, improve, repair, operate, and maintain—(i) air traffic control facilities and equipment; (ii) research testing sites and facilities; and (iii) such other real and personal property (including office space and patents), or any interest therein . . . as the Administrator considers necessary; [and] (B) to lease to others such real and personal property . . ..
Section 106(l)(6) authorizes FAA:
[to enter into] such contracts, leases, cooperative agreements, or other transactions as may be necessary to carry out the functions of FAA.
Section 40110(a)(2) authorizes FAA:
[to] dispose of an interest in property for adequate compensation . . ..
(All emphasis added.)
As evidence that these provisions authorize slots to be leased as property, FAA points to bankruptcy proceedings where slots subject to lease have been accorded some proprietary status. 2008 FAA Brief at 41-43. FAA asserts that it, too, has a property interest in slots subject to lease because: (1) FAA has sovereignty over U.S. navigable airspace; (2) airspace has been characterized as public property; (3) FAA regulates the use of navigable airspace; (4) as a product of its regulation, FAA has constructed slots as an intangible property interest in airspace use; and (5) as the slot constructor, FAA owns and may lease its intangible slots. FAA states further that it may—in fact, must—charge adequate compensation, and even market prices, for this property under 49 U.S.C. sect. 40110.  2008 FAA Brief at 41, 50-53.
As discussed below, however, slots are not property subject to FAA's property disposition authority. Nor are they the mere product of FAA regulation; they are FAA regulation. Moreover, FAA's argument that slots are property proves too much—it suggests that the agency has been improperly giving away potentially millions of dollars of federal property, for no compensation, since it created the slot system in 1968.
Parsing its property acquisition and disposition authorities under 49 U.S.C. sections 106(n) and 40110(a)(2) and applying general dictionary definitions, FAA maintains that when it uses its regulatory authority to delineate a time period for authorized takeoff or landing—a slot—it constructs or acquires an intangible property interest in airspace use that it may lease to others for adequate compensation. 2008 FAA Letter at 2-3; 2008 FAA Brief at 47-48. Understanding Congressional will requires more than the mechanical application of dictionary definitions, however, see Faircloth v. Lundy Packing Co., 91 F.3d 648, 660 (4th Cir. 1996) (Michael, J., concurring and dissenting), and it is a cardinal rule of statutory construction that statutes must be read as a whole, since the meaning of statutory language, plain or not, depends on context. King v. St. Vincent's Hospital, 502
The structure of FAA's statutory authority and its legislative history support this conclusion. Congress has given FAA different authorities to carry out different responsibilities—it has regulatory authority in 49 U.S.C. sect. 40103 to ensure the safe and efficient use of the navigable airspace, and property acquisition and disposition authority in 49 U.S.C. sections 106 and 40110 to support FAA's mission and general operations. As relevant here, FAA has had these same basic authorities since its creation in 1958. The fact that Congress authorized FAA to carry out its regulatory responsibilities (including assignment of slots) under the strictures of sect. 40103 undercuts FAA's argument that Congress simultaneously authorized FAA to carry out many of these same responsibilities under the very different strictures of sections 106 and 40110. Congress has never suggested as much in the half-century of FAA's existence, nor, until 2008, has FAA. Thus FAA may not rely on its general property disposition authority to carry out its regulatory slot assignment functions. See, e.g., American Petroleum Inst. v. EPA, 52 F.3d 1113, 1119-20 (D.C. Cir. 1995) (EPA cannot rely on general rulemaking authority to regulate air pollutant in manner conflicting with authority specific to that pollutant and cannot uncouple the first sentence of [Clean Air Act provision] from the rest of the section in order to expand its authority beyond the aims and limits of the section as a whole.).
Finally, FAA's reading of its property authority, particularly the purported significance of a 1996 amendment to that authority, is unavailing because it would interfere with Congress' constitutional prerogatives to set programmatic spending levels and oversee agency activities.
Case law regarding the legal status of slots and regulatory licenses confirms our conclusion that slots are not property in the hands of FAA. To demonstrate that slots are property, FAA cites three bankruptcy cases—In re McClain Airlines, Inc., 80 B.R. 175 (Bankr. D.
The cases do not support FAA's position. At most, they recognize the undisputed fact that slots have value in the hands of carriers to whom they are assigned, at least when the slots are transferable to other carriers. The decisions do not address the issue we face here: the nature of slots when they are unassigned and held by FAA. In fact, the cases underscore the limited nature of slots even after they are assigned: they remain subject to FAA withdrawal at any time for operational reasons and to FAA recall for non-use. In Gull Air, for example, the most recent, and the only appellate court, decision cited by FAA, FAA itself argued that slots were not the carrier's property but rather, as specified in FAA's regulations, operating privileges subject to absolute FAA control. 890 F.2d at 1258. The First Circuit Court of Appeals ruled only that slots' transferability under the High Density Rule created a limited proprietary interest in slots that is encumbered by conditions that FAA imposed in its regulations.
Furthermore, even if slots were not transferable, there is little doubt that they have value to carriers. Yet the U.S. Supreme Court has made clear that the fact that a government license is valuable to the license holder does not render the license property in the hands of the issuing agency. Rather, the license is no more and no less than [the agency's] sovereign power to regulate. Cleveland v.
Without doubt, Louisiana has a substantial economic stake in the video poker industry. The State collects an upfront 'processing fee' for each new license application . . ., a separate 'processing fee' for each renewal application . . ., an 'annual fee' from each device owner . . ., an additional 'device operation' fee . . ., and, most importantly, a fixed percentage of net revenue from each video poker device . . .It is hardly evident, however, why these tolls should make video poker licenses 'property' in the hands of the State. The State receives the lion's share of its expected revenue not while the licenses remain in its own hands, but only after they have been issued to licensees. Licenses pre-issuance do not generate an ongoing stream of revenue. At most, they entitle the State to collect a processing fee from applicants for new licenses. Were an entitlement of this order sufficient to establish a state property right, one could scarcely avoid the conclusion that States have property rights in any license or permit requiring an up front fee, including drivers' licenses, medical licenses, and fishing and hunting licenses. Such licenses, as the Government itself concedes, are 'purely regulatory.'
FAA compares its proposed slot leases to patents, a type of intangible property it is authorized to dispose of under 49 U.S.C. sect. 106(n)(1)(A)(ii). 2008 FAA Brief at 33, 51. But the
[T]hese intangible rights of allocation, exclusion, and control amount to no more and no less than Louisiana's sovereign power to regulate. . . [T]he state's right of control does not create a property interest any more than a law licensing liquor sales in a State that levies a sales tax on liquor. Such regulations are paradigmatic exercises of the States' traditional police powers.
The Government compares the State's interest in video poker licenses to a patent holder's interest in a patent that she has not yet licensed. Although it is true that both involve the right to exclude, we think the congruence ends there. Louisiana does not conduct gaming operations itself, it does not hold video poker licenses to reserve that prerogative, and it does not sell video poker licenses in the ordinary commercial sense. Furthermore, while a patent holder may sell her patent . . ., the State may not sell its licensing authority. Instead of a patent holder's interest in an unlicensed patent, the better analogy is to the Federal Government's interest in an unissued patent. That interest, like the State's interest in licensing video poker operations, surely implicates the Government's role as sovereign, not as property holder.
II. FAA's Authority to Auction Slots Under its User Fee Authority
Because FAA may not auction slots under its property disposition authority and has no explicit authority to charge a fee for the assignment of slots, the only other arguable authority on which FAA could rely is IOAA.  That authority is currently unavailable because as of fiscal year 1998, Congress has prohibited FAA's imposition of any new aviation user fees unless it obtains specific statutory authority. Because FAA lacks authority to collect such fees, if it nevertheless goes forward with an auction, it may not retain or use the proceeds.
To understand the impact of Congress' prohibition, some context and a brief history are helpful. FAA is funded from a combination of sources, which can be roughly divided into three types: excise tax revenue, General Fund appropriations, and reimbursements from services provided and user fees charged. FAA, Fiscal Year 2007 Performance and Accountability Report, at 121. For the last 10 years, Congress has annually prohibited FAA from implementing any new aviation user fees not authorized by Congress. The prohibition first appeared in the 1998 Department of Transportation and Related Agencies Appropriations Act and stated:
[N]one of the funds in this Act shall be available for the Federal Aviation Administration to plan, finalize, or implement any regulation that would promulgate new aviation user fees not specifically authorized by law after the date of enactment of this Act.Pub. L. No. 105-66, 111 Stat. 1425, 1429 (1997). At the time, the Conference Committee expressed very serious concerns, on both technical and policy-related grounds, about new aviation user fees that FAA had proposed. The Committee made clear that the existing excise tax system, supplemented by appropriated funds, would provide sufficient revenue for FAA without new fees. H. R. Rep. No. 105-313 at 40-41 (Conf. Rep.) (1997). The Committee specifically acknowledged the authority that IOAA generally provides to agencies and made clear that it intended to restrict this authority in FAA's case:
The conferees are aware of FAA's opinion that the agency has the legal authority to establish new user fees under the generic authority provided in the User Fee Statute, and do not wish to see FAA circumvent the legislative process and avoid the normal cost controls which apply to other federal agencies through the administrative implementation of new user fees. The conferees emphasize, however, that this provision does not prevent the FAA from implementing new user fees. It only provides that such fees must be specifically authorized by the Congress.
[N]one of the funds in this [Appropriations] Act shall be available for the Federal Aviation Administration to finalize or implement any regulation that would promulgate new aviation user fees not specifically authorized by law after the date of the enactment of this Act.
Consolidated Appropriations Act, 2008, Pub. L. No. 110-161, 121 Stat. 1844, 2379 (2007).
In considering the fiscal year 2008 prohibition, the House Committee on Appropriations commented on its serious concerns about the impact of user fees, and the Senate Committee on Appropriations expressed its desire that any degradation in the Committee's ability to annually set programmatic spending levels and oversee the agency's spending habits as part of the reauthorization process should be strenuously resisted.
This fiscal year 2008 prohibition precludes FAA's use of IOAA as authority to auction slots because FAA's slot auctions would amount to a new aviation user fee not specifically authorized by law. FAA has never previously imposed a fee for authorization to use navigable airspace at a specific time; thus FAA's slot auction would constitute exactly the type of new aviation user fee that Congress has prohibited. Indeed, FAA recognized that slot auctions would constitute a user fee when it proposed to institute such a fee in 1980, and again in 1986 when it decided not to do so. FAA also appeared to recognize that slot auctions would constitute a user fee in 2006 and 2007 when, in the face of the annual appropriations restrictions, it promised to and did seek legislation authorizing it to conduct the auctions. FAA's April 2008 proposal in fact acknowledges that because of the appropriations restriction, FAA continues to believe that it cannot rely on a market-based [slot] allocation method under a purely regulatory approach, which is why it explicitly sought legislation on this matter. 73 Fed. Reg. at 20846, 20852.
FAA suggests that because it will conduct the
FAA points to examples of other agencies auctioning or charging market-based fees for use of public lands or other public property. 2008 FAA Brief at 48-49. These are inapposite because unlike FAA, those agencies had specific statutory authority for their activities. See, e.g, 16 U.S.C. sect. 472a (U.S. Department of Agriculture auction of timber rights on National Forest Service land); 43 U.S.C. sect. 315b (U.S. Department of Interior issuance of grazing permits for public lands for reasonable fees). FAA's most analogous example is the Federal Communications Commission's auction of license rights to the electromagnetic spectrum. Again, however, Congress has specifically authorized the FCC to conduct such auctions, including specifying the conditions necessary for auction, bidder qualifications, and treatment of auction proceeds. See 47 U.S.C. sect. 309(j). As discussed above, despite FAA's specific requests, Congress has given FAA no comparable auction authority.
Finally, even if Congress were to remove the annual appropriations restriction that prohibits FAA from promulgating new aviation user fees, without other specific authority, it could impose only a cost-based fee, not the type of market-based fee it seeks to obtain by auctioning slots to the highest bidder. Under IOAA, when an agency is but one actor in the marketplace, it acts in a commercial, non-governmental capacity and may charge a fee based on the market price of the service provided. When instead an agency exercises its sovereign power and regulates activities based on public policy goals—as FAA would be acting, if it were to auction slots—it acts in a regulatory capacity, and user fees are limited to the agency's costs of providing the specific benefit to the individual recipient. If FAA's fee were based on market value and exceeded its cost of providing the slot to the recipient airline, the fee could rise to the level of a tax. A tax would be beyond IOAA's grant of authority and FAA would have to have some other Congressionally-delegated authority to impose it. National Cable Television Ass'n, Inc. v.
We conclude that FAA may not auction slots under its property disposition authority, user fee authority, or any other authority, and thus also may not retain or use proceeds of any such auctions. Going forward with the planned Newark auction or any other auction would be without legal basis, and if FAA conducted an auction and retained and used the proceeds, GAO would raise significant exceptions, under its account settlement authority, 31 U.S.C. sect. 3526, for violations of the purpose statute, 31 U.S.C. sect. 1301(a), and the Antideficiency Act, 31 U.S.C. sect. 1341(a)(1)(A).
If there are questions concerning these matters, please contact Managing Associate General Counsel Susan. D. Sawtelle at (202) 512-6417 or Managing Associate General Counsel Susan A. Poling at (202) 512-2667. Assistant General Counsels David Hooper and Thomas H. Armstrong, Senior Attorney Bert Japikse, and Staff Attorney James Murphy also participated in preparing this opinion.
Gary L. Kepplinger
 See 73 Fed. Reg. 20846 (
 73 Fed. Reg. 46136 (
 See 73 Fed.
 As stated in our letter of
 This opinion does not evaluate whether FAA has authority to implement other market-based mechanisms. GAO has supported consideration of the use of market-based mechanisms (assuming sufficient legal authority) as a means of allocating scarce transportation resources and addressing congestion. See 21st Century Challenge: Reexamining the Base of the Federal Government (GAO-05-SP) (Feb. 2005). We have not specifically evaluated the potential effectiveness of FAA's slot auction proposal.
 Consistent with our regular practice in preparing legal opinions, see GAO, Procedures and Practices for Legal Decisions and Opinions, GAO-06-1064SP (
 Prior to deregulation, scheduled air carriers were required to obtain certificates of public convenience and necessity from the Civil Aeronautics Board (CAB), which approved routes and tariffs for air commerce. 49 U.S.C. App. sections1371, 1373 (1988). Deregulation was set in motion by the Airline Deregulation Act of 1978, Pub. L. No. 95-504, 92 Stat. 1705 (1978), and culminated in the
 A slot was defined as the operational authority to conduct one [Instrument Flight Rules] landing or takeoff operation each day during a specific hour or 30 minute period at one of the High Density Traffic Airports . . .. 50 Fed. Reg. at 52195, codified at 14 C.F.R. sect. 93.213(a)(2) (1986).
 See, e.g., H. R. Rep. No. 103-240 (1993) at 29, 1994 U.S.C.C.A.N. 1676, 1699.
 Airport and Airway Safety and Capacity Expansion Act of 1987, Pub. L. No. 100-223, sect. 292(b)(7), 101 Stat. 1486, 1507, 1511 (1987), codified at 49 U.S.C. App. sect. 1389 (b)(7) (1988); Federal Aviation Reauthorization Act of 1994, Pub. L. No. 103-305, sect. 206(a)(1), 108 Stat. 1584 (1994), codified at 49 U.S.C. sect. 41714 (1994).
 See Wendell H. Ford Aviation Investment and Reform Act for the 21st Century (
 See Pub. L. No. 105-66, 111 Stat. 1429 (
 FAA believed this action was permissible notwithstanding the
 The Department of Transportation submitted draft legislation on this subject to Congress in February 2007. See Letter from Mary E. Peters, Secretary of Transportation, to Nancy Pelosi, Speaker of the House of Representatives,
 See 71 Fed. Reg. 77854 (
 73 Fed. Reg. at 20850 n. 4; see also FAA Program Office Response in Consolidated Protests of Air Transport Association et al. of the Bid Solicitation and Conduct of Auction Process, No. 08-ODRA-00452 (Sept. 4, 2008) (2008 FAA Brief) at 59-60; 2008 FAA Letter at 7. FAA states that while it continues to believe it lacks authority to implement congestion pricing, it now believes it has authority to conduct auctions.
 See, e.g., 49 U.S.C. sect. 40113(e) (costs for providing safety-related training and operational services to foreign aviation authorities); 49 U.S.C. sect. 45301(a)(1) (fees from aircraft that fly over but do not take off or depart from the
 See, e.g., 14 C.F.R. sect. 93.213(a)(2) (1986); proposed 14 C.F.R. sections 93.62, 93.162, 73 Fed. Reg. at 20866, 29642.
 See 73 Fed. Reg. at 20853, 29631; 2008 FAA Letter at 1-3; 2008 FAA Brief at 41, 50-53, 62.
 49 U.S.C. sect. 40103(a)(1) (The United States Government has exclusive sovereignty of airspace of the United States.).
 2008 FAA Brief at 47, citing Air Pegasus of D.C., Inc. v.
 Acknowledging that 49 U.S.C. sect. 40110(a)(2) requires FAA's payment of adequate compensation when it disposes of property, FAA suggests this compensation would have to be market price: [w]hen the Government provides . . . access to public property, whether by a lease or a license, the standard that the OMB requires and [that] agencies . . . follow unless otherwise prohibited by law, is that the Government must charge market prices. OMB Circular A-25 (when the Government leases or sells goods, such as leasing space in a federal building, the charge will be based on market prices). 2008 FAA Brief at 50 (emphasis added).
 Compare Federal Aviation Act of 1958, Pub. L. No. 85-726, sections 307(a), 307(c) (FAA airspace control authority to assign by rule, regulation, or order and prescribe air traffic rules and regulations to ensure efficient use of the airspace) with id. sections 303(c)(2), 303(c)(3) (FAA administrative authority to acquire by purchase, condemnation, lease, or otherwise, real property or interests therein and, for adequate compensation, by sale, lease, or otherwise, to dispose of any real or personal property or interest therein).
 As we explained in SBA's Imposition of Oversight Review Fees on PLP Lenders, B-300248,
 IOAA is based on the policy that the services the federal government provides should be self-sustaining to the extent possible. 31 U.S.C. sect. 9701(a). As such, it authorizes federal agencies to charge fees for services provided by the agency when there is no independent statutory source for the charging of a fee or where a fee statute fails to define fee-setting criteria. American Medical Ass'n v.
 Examples of excise taxes which generate revenue for FAA include a tax on domestic airline tickets (26 U.S.C. sect. 4261(a)), a tax on the price paid for cargo transportation (26 U.S.C. sect. 4271(a)), a tax on aviation gasoline and jet fuel (26 U.S.C. sections 4081(a)(2)(A)(ii), (a)(2)(C)), and a per person tax on international arrivals and departures (26 U.S.C. sect. 4261(c)).
 See note 20 above.
 Available at http://www.faa.gov/about/plans_reports/media/FAA%20FY%2007%20PAR%20FINAL.pdf (last visited
 H. R. Rep. No. 110-238 at 19 (2007).
 S. Rep. No. 110-131 at 21 (2007).
 Before Congress enacted this legislation in 1993, FCC lacked authority to auction the spectrum, although it could issue licenses under its regulatory authority. Federal Communications Commission's Order on Improving Public Safety Communications in the 800 MHz Band, B-303413,
 National Park Service—
 When the cost of the benefit conferred is exceeded by any material amount, one immediately gets into the taxing area, and the result is revenue and not a fee. National Ass'n of Broadcasters v. FCC, 554 F.2d 1118, 1129 n. 28 (D.C. Cir. 1976); National Park Service—