50 CFR §600.1513

1. (a)If a type-approval holder receives a Revocation Letter pursuant to § 600.1512, the type-approval holder may file an appeal of the revocation to the NMFS Assistant Administrator.
2. (b)An appeal must be filed within 14 calendar days of the date of the Revocation Letter. A type-approval holder may not request an extension of time to file an appeal.
3. (c)An appeal must include a complete copy of the Revocation Letter and its attachments and a written statement detailing any facts or circumstances explaining and refuting the failures summarized in the Revocation Letter.
4. (d)The NMFS Assistant Administrator may, at his or her discretion, affirm, vacate, or modify the Revocation Letter and send a letter to the type-approval holder explaining his or her determination, within 21 calendar days of receipt of the appeal. The NMFS Assistant Administrator's determination constitutes the final agency decision.