In subsection (a), the words “Federal Acquisition Regulation” are substituted for “single system of Government-wide procurement regulations as defined in section 403(4) of this title” because section 3(a)(1) of the Office of Federal Procurement Policy Act Amendments of 1988 (Public Law 100–679, 102 Stat. 4055) substituted “Federal Acquisition Regulation” for “single system of Government-wide procurement regulations” in section 6 of the Office of Federal Procurement Policy Act (Public Law 93–400, 88 Stat. 797, 41:406) and because section 3(c) of the Office of Federal Procurement Policy Act Amendments of 1988 (102 Stat. 4056) struck section 4(4) of the Office of Federal Procurement Policy Act (88 Stat. 797, 41:403(4)), as amended by section 4 of the Office of Federal Procurement Policy Act Amendments of 1983 (Public Law 98–191, 97 Stat. 1326), which had defined “single system of Government-wide procurement regulations”.