The purchase/SCM team, represented by the CO, can revoke acceptance of a nonconforming product or service if original acceptance:
The Postal Service has the same rights and duties upon revocation as upon rejection. Revocation of acceptance must occur within a reasonable time after the CO discovers the deficiency. These issues are addressed in paragraph a of Clause 4-1: General Terms and Conditions and Clause 2-1: Inspection and Acceptance.