46 C.F.R. § 13.303
Each applicant for a Tank Barge-PIC endorsement for DL or LG must meet the requirements of either paragraphs (a) and (b) or paragraph (c) of this section.
(a) Each applicant must provide evidence of—
(b) Participation, under the supervision of a Tank Vessel-PIC or Tank Barge-PIC, in at least 10 transfers of liquid cargo in bulk of the classification desired on any tank vessel, including at least—
(c) Each applicant already holding an MMC endorsed as Tank Barge-PIC for DL and seeking an endorsement for LG, or the converse, must—
[CGD 79-116, 60 FR 17142, Apr. 4, 1995, as amended by CGD 79-116, 62 FR 25134, May 8, 1997; USCG-2006-24371, 74 FR 11260, Mar. 16, 2009; USCG-2004-17914, 78 FR 77996, Dec. 24, 2013; USCG-2021-0834, 89 FR 102337, Dec. 17, 2024]