9 C.F.R. § 2.13

Except as otherwise provided in § 2.3(c), any licensee or registrant may appeal all or part of the inspection findings in an inspection report to the Deputy Administrator. To appeal, the licensee or registrant must send a written statement contesting the inspection finding(s) and include any documentation or other information in support of the appeal. To receive consideration, the appeal must be received by the Deputy Administrator within 21 days of the date the licensee or registrant received the inspection report that is the subject of the appeal.