49 CFR 661.17: Failure to comply with certification.

If a successful bidder or offeror fails to demonstrate that it is in compliance with its certification, it will be required to take the necessary steps in order to achieve compliance. If a bidder or offeror takes these necessary steps, it will not be allowed to change its original bid price or the price of its final offer. If a bidder or offeror does not take the necessary steps, it will not be awarded the contract if the contract has not yet been awarded, and it is in breach of contract if a contract has been awarded.