48 C.F.R. § 36.608
Architect-engineer contractors shall be responsible for the professional quality, technical accuracy, and coordination of all services required under their contracts. A firm may be liable for Government costs resulting from errors or deficiencies in designs furnished under its contract. Therefore, when a modification to a construction contract is required because of an error or deficiency in the services provided under an architect-engineer contract, the contracting officer (with the advice of technical personnel and legal counsel) shall consider the extent to which the architect-engineer contractor may be reasonably liable. The contracting officer shall enforce the liability and issue a demand for payment of the amount due, if the recoverable cost will exceed the administrative cost involved or is otherwise in the Government's interest. The contracting officer shall include in the contract file a written statement of the reasons for the decision to recover or not to recover the costs from the firm.
48 C.F.R. §36.608