Government contractors are often faced with the dilemma of their proposed key personnel becoming unavailable for contract performance, through no fault of their own, at a point after proposal submission but prior to contract award. In such cases, the Government Accountability Office (GAO) has espoused a rule that obligates offerors to advise contracting agencies of material changes in proposed staffing, even after proposal submission. See, e.g., AttainX, Inc., B-419306, B-419306.2, Jan. 12, 2021, 2021 CPD ¶ 21. But a recent decision by the Court of Federal Claims (CoFC) challenges this rule, casting doubt on its basis in law or regulation.