Protest to Lack of Notification of Change in Contract Period and Assertion That Protest Was Untimely

Protest was made to the award of a contract on the basis that protester had not been notified of a change in the period of performance. Contracting agency contended that the protest was untimely. Bidder asserted that they hand-delivered protest within 10 working days, and agency did not deny assertion, therefore the protest was considered timely. Change in performance time during negotiations from 11 weeks to 6 months was a substantial change and must be issued by written amendment and given to all offerors in competitive range. Protest was sustained.