USCG Exam PracticeMMC application and renewal — 46 CFR Subchapter B
A mariner's MMC was renewed and a new MMC was issued before the old one expired. Which statement correctly describes the status of the previously held MMC?
- A. It remains valid until its original expiration date as a backup credential.
- ✓ It becomes invalid upon issuance of the new MMC and must be returned to the Coast Guard.Correct
- C. It remains valid for 30 days after the new MMC is issued to allow for transition.
- D. It is valid only for service aboard vessels not requiring an officer endorsement.
Why B is correct
46 CFR §10.205(d) states that when an MMC is renewed or re-issued before its expiration date, the replaced MMC becomes invalid. Additionally, 46 CFR §10.209(g) requires the mariner to return any previously issued and unexpired MMC to the Coast Guard when a new MMC is issued.