Construction services and materials for Federal facilities shall be procured in accordance with the policies and procedures set forth in chapter 
137 of title 
10, section 
2377 of title 
10, title III of the Federal Property and Administrative Services Act of 1949 (
41 U.S.C. 
251 et seq.), and section 
205b
(2) of this title. Determination of a design method shall be based upon preliminary market research as required under section 
2377
(c) of title 
10 and section 314B(c) of the Federal Property and Administrative Services Act of 1949 (
41 U.S.C. 
264b
(c)). If the requirements of this subchapter conflict with the provisions of section 
2377 of title 
10 or section 314B of the Federal Property and Administrative Services Act of 1949, then the provisions of  2377 or 314B shall take precedence.