B-134853, FEB. 26, 1958

YOUR CLAIM WAS ORIGINALLY DISALLOWED BY OUR OFFICE SETTLEMENT Z 1854943. FOR THE REASON THAT PER DIEM RATES WHICH ARE FIXED BY THE TRAVEL ORDER MAY NOT BE INCREASED RETROACTIVELY IN THE ABSENCE OF A SHOWING THAT A CLERICAL OR OTHER ERROR WAS MADE IN THE ORDERS INCORRECTLY INTERPRETING THE INTENT OF THE OFFICER AUTHORIZING THE TRAVEL. THE RECORD DISCLOSES THAT TRAVEL ORDER NUMBER 138 WAS ISSUED TO YOU ON DECEMBER 26. YOU WERE FURTHER AUTHORIZED IN THE TRAVEL ORDER PER DIEM NOT TO EXCEED FIVE DOLLARS ($5.00) PER DAY WHEN GOVERNMENT QUARTERS AND MESSING FACILITIES WERE AVAILABLE. CHAPTER 9 OF AIR FORCE MANUAL 40-10 AND PERMITTED PROSPECTIVELY EFFECTIVE AMENDMENTS TO OUTSTANDING TRAVEL ORDERS INCREASING THE PER DIEM RATE TO $6.00 PER DAY IF GOVERNMENT QUARTERS WERE USED.