---
kind: "section"
citation: "46 C.F.R. § 13.503"
title: "46"
number: "13.503"
heading: "Service requirements."
url: "https://uscodex.org/cfr/46/13.503"
---

# §13.503. Service requirements.

- (a) Each applicant for a Tank Vessel-Engineer endorsement must provide evidence of at least—
  - (1) 90 days of service as an engineering officer on tankships or self-propelled tank vessels certified to carry DL or LG appropriate to the endorsement applied for;
  - (2) 90 days of rating or cadet service in the engine department on tankships or self-propelled tank vessels certified to carry DL or LG appropriate to the endorsement applied for; or
  - (3) **A combination of the service in paragraphs (a) (1) and (2) of this section.**
- (b) Each applicant already holding an MMC endorsed as Tank Vessel-Engineer for DL and seeking an endorsement for LG, or the converse, must prove at least half the service required by [paragraph (a)](#a) of this section.

## Notes

### Amendments

[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 77997, Dec. 24, 2013; USCG-2021-0834, 89 FR 102337, Dec. 17, 2024]

### Authority

Authority: 46 U.S.C. 3703, 7317, 8105, 8703, 9102; DHS Delegation No. 00170.1, Revision No. 01.4.

### Source

Source: CGD 79-116, 60 FR 17142, Apr. 4, 1995, as amended by USCG-2021-0097, 89 FR 93106, Nov. 25, 2024, unless otherwise noted.

### Amendments

[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 77997, Dec. 24, 2013; USCG-2021-0834, 89 FR 102337, Dec. 17, 2024]