StacksVerified U.S. regulatory reference

46 CFR §10.207

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
For recordkeeping purposes only, a mariner's official MMC identification number is the individual's social security number. However, a unique serial number, called the mariner reference number, and not the social security number, will appear on the credential.