To the extent that aircraft so leased were acquired under chapter 5 of that Act [
22 U.S.C. 2795 et seq.], funds used pursuant to this paragraph to finance such leases shall be credited to the Special Defense Acquisition Fund under chapter 5 of that Act (excluding the amount of funds that reflects the charges described in section 21(e)(1) of that Act [
22 U.S.C. 2761(e)(1)]). The funds described in the parenthetical clause of the preceding sentence shall be available for payments consistent with sections 37(a) and 43(b) of that Act [
22 U.S.C. 2777(a), 2792(b)].