Whenever the President determines it to be in furtherance of the purposes of this chapter, functions authorized by this chapter may be performed without regard to such provisions of law (other than section 5 of title
41, section
252 of title 41, and the Renegotiation Act of 1951, as amended [
50 App. U.S.C.
1211 et seq.]) regulating the making, performance, amendment, or modification of contracts and the expenditure of Government funds as the President may specify.