In this part, the term “competitive procedures” means procedures under which the head of an agency enters into a contract pursuant to full and open competition. Such term also includes—

(1) procurement of architectural or engineering services conducted in accordance with chapter 11 of title 40;

(2) the competitive selection for award of science and technology proposals resulting from a general solicitation and the peer review or scientific review (as appropriate) of such proposals;

(3) the procedures established by the Administrator of General Services for the multiple award schedule program of the General Services Administration if—

(A) participation in the program has been open to all responsible sources; and

(B) orders and contracts under such program result in the lowest overall cost alternative to meet the needs of the United States;

(4) procurements conducted in furtherance of section 15 of the Small Business Act (15 U.S.C. 644) as long as all responsible business concerns that are entitled to submit offers for such procurements are permitted to compete; and

(5) a competitive selection of research proposals resulting from a general solicitation and peer review or scientific review (as appropriate) solicited pursuant to section 9 of the Small Business Act (15 U.S.C. 638).