46 CFR §13.501

1. (a)Be at least 18 years old;
2. (b)Apply on a form provided by the Coast Guard;
3. (c)Provide evidence of—
   1. (1)Passing a physical and medical examination according to § 13.125;
   2. (2)Service on tankships and self-propelled tank vessels in accordance with § 13.503;
   3. (3)Completion of an approved firefighting course providing training in the subjects identified in table 3 to § 13.121(e) completed within 5 years of the date of application for the endorsement, unless they have previously submitted such a certificate for a tank vessel endorsement or officer endorsement on an MMC; and
   4. (4)Completion of an approved Tankship course in dangerous liquids or liquefied gases, appropriate for the endorsement applied for within the previous 5 years. A course certificate used for original issuance or renewal of an endorsement cannot be used for a subsequent renewal of the same endorsement; and
4. (d)Be capable of speaking and understanding, in English, all instructions needed to commence, conduct, and complete a transfer of cargo or fuel.