46 CFR 10.237: Right to appeal Coast Guard credential decisions

Last reviewed: October 14, 2026

This section covers appeals of Coast Guard decisions on mariner credentials. The Coast Guard must give a written statement of reasons when it refuses an MMC, medical certificate, or endorsement. Affected persons may appeal under subpart 1.03 of part 1 of this chapter.

Applies toApplicants refused an MMC, medical certificate, or endorsement, and any person directly affected by a Coast Guard decision or action under this subchapter.

What it says

  1. If the Coast Guard refuses to grant an applicant an MMC, medical certificate, or endorsement, it will provide a written statement listing the reason(s) for denial.

    46 CFR 10.237(a)“If the Coast Guard refuses to grant an applicant an MMC, medical certificate, or endorsement it will provide, a written statement listing the reason(s) for denial.”

  2. Any person directly affected by a decision or action taken under this subchapter, by or on behalf of the Coast Guard, may appeal under subpart 1.03 of part 1 of this chapter.

    46 CFR 10.237(b)“Any person directly affected by a decision or action taken under this subchapter, by or on behalf of the Coast Guard, may appeal under the provisions of subpart 1.03 of part 1 of this chapter.”

  3. The Coast Guard will not review Transportation Security Administration decisions to suspend, revoke, or deny a mariner's TWIC.

    46 CFR 10.237(c)“The Coast Guard will not review decisions made by the Transportation Security Administration to suspend, revoke, or deny a mariner's TWIC.”

Common questions

Will I get a reason in writing if the Coast Guard denies my MMC?

Yes. If the Coast Guard refuses to grant an MMC, medical certificate, or endorsement, it will provide a written statement listing the reason(s) for denial.

“If the Coast Guard refuses to grant an applicant an MMC, medical certificate, or endorsement it will provide, a written statement listing the reason(s) for denial.”

Who may appeal a Coast Guard credentialing decision?

Any person directly affected by a decision or action taken under this subchapter, by or on behalf of the Coast Guard, may appeal. The appeal falls under subpart 1.03 of part 1 of this chapter.

“Any person directly affected by a decision or action taken under this subchapter, by or on behalf of the Coast Guard, may appeal under the provisions of subpart 1.03 of part 1 of this chapter.”

Can the Coast Guard review a TWIC denial by TSA?

No. The Coast Guard will not review Transportation Security Administration decisions to suspend, revoke, or deny a mariner's TWIC.

“The Coast Guard will not review decisions made by the Transportation Security Administration to suspend, revoke, or deny a mariner's TWIC.”

The text of 46 CFR 10.237

Electronic Code of Federal Regulations (eCFR), current as of April 16, 2026 · Read it on eCFR

Right of appeal

(a) If the Coast Guard refuses to grant an applicant an MMC, medical certificate, or endorsement it will provide, a written statement listing the reason(s) for denial.

(b) Any person directly affected by a decision or action taken under this subchapter, by or on behalf of the Coast Guard, may appeal under the provisions of subpart 1.03 of part 1 of this chapter.

(c) The Coast Guard will not review decisions made by the Transportation Security Administration to suspend, revoke, or deny a mariner's TWIC.

The plain-English explanation on this page was written with AI from the regulation text above and checked automatically before publishing: every quote appears in the text, every number comes from it, and a second model confirmed each statement adds nothing the text doesn't say. Regulation text current as of April 16, 2026. The regulation text governs. RegKnot is not affiliated with the U.S. Coast Guard.