USCG: CG-MMC Policy Letter 01-18 – Guidelines for Requesting Harmonization of Expiration Dates of Merchant Mariner Credentials and Mariner Medical Certificates When Applying for an Original or Renewal Merchant Mariner Credential


This policy letter provides guidance for requesting a Merchant Mariner Credential (MMC) and Mariner Medical Certificate with harmonized expiration dates in accordance with the requirements of Section 304 of the 2015 Coast Guard Authorization Act (CGAA), Public Law No. 114-120. Regional Examination Centers (REC) will accept application packets with requests for harmonization of expiration dates.

Click here to download CG-MMC Policy Letter 01-18

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