{"data":{"id":"us/48-cfr-43.101","jurisdiction":"us","citation":"48 CFR 43.101","heading":"43.101 Definitions.","body":"As used in this part—\nAdministrative change means a unilateral (see 43.103(b)) contract change, in writing, that does not affect the substantive rights of the parties (e.g., a change in the paying office or the appropriation data).\nEffective date means—\n(1) For a solicitation amendment, change order, or administrative change, the effective date shall be the issue date of the amendment, change order, or administrative change.\n(2) For a supplemental agreement, the effective date shall be the date agreed upon by the contracting parties.\n(3) For a modification issued as a confirming notice of termination for the convenience of the Government, the effective date of the confirming notice shall be the same as the effective date of the initial notice.\n(4) For a modification converting a termination for default to a termination for the convenience of the Government, the effective date shall be the same as the effective date of the termination for default.\n(5) For a modification confirming the termination contracting officer's previous letter determination of the amount due in settlement of a contract termination for convenience, the effective date shall be the same as the effective date of the previous letter determination.","path":["Title 48—Federal Acquisition Regulations System","CHAPTER 1—FEDERAL ACQUISITION REGULATION","SUBCHAPTER G—CONTRACT MANAGEMENT","PART 43—CONTRACT MODIFICATIONS","Subpart 43.1—General"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-48.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:29Z","sha256":"f097e65c2a17e28682130ac25a6f95eeed3f762bf58f5511137d76cb228ac00d","source_id":"us-cfr","stale":true,"prev":"us/48-cfr-43.000","next":"us/48-cfr-43.102"},"notice":"GroundRules: Original legal text. Not legal advice."}