19 C.F.R. § 118.22
Notice of immediate suspension or proposed revocation and cancellation action
Adverse action pursuant to the provisions of § 118.21(a) or (b) is initiated when the port director serves written notice on the operator or entity selected to operate the CES. The notice shall be in the form of a statement specifically setting forth the grounds for the adverse action and shall inform the operator of the appeal procedures under § 118.23 of this part.