---
kind: "section"
citation: "33 C.F.R. § 157.39"
title: "33"
number: "157.39"
heading: "Machinery space bilges."
url: "https://uscodex.org/cfr/33/157.39"
---

# §157.39. Machinery space bilges.

- (a) A tank vessel may discharge an oily mixture from a machinery space bilge that is combined with an oil cargo residue if the vessel discharges in compliance with [§ 157.37](/cfr/33/157.37.md).
- (b) A tank vessel may discharge an oily mixture from a machinery space bilge that is not combined with an oil cargo residue if the vessel:
  - (1) Is proceeding en route;
  - (2) Is discharging an effluent with an oil content of less than 15 parts per million; and
  - (3) Has in operation an oil discharge monitoring and control system in compliance with [§ 157.12](/cfr/33/157.12.md) and oil separating equipment in compliance with [33 CFR 155.380](/cfr/33/155.380.md).

## Notes

### Amendments

[CGD 74-32, 40 FR 48283, Oct. 14, 1975, as amended by USCG-2000-7641, 66 FR 55573, Nov. 2, 2001; USCG-2004-18939, 74 FR 3382, Jan. 16, 2009]

### Authority

Authority: 33 U.S.C. 1903; 46 U.S.C. 3703, 3703a (note); Department of Homeland Security Delegation No. 0170.1. Subparts G, H, and I are also issued under section 4115(b), Pub. L. 101-380, 104 Stat. 520; Pub. L. 104-55, 109 Stat. 546.

### Source

Source: CGD 74-32, 40 FR 48283, Oct. 14, 1975, unless otherwise noted.

### Amendments

[CGD 74-32, 40 FR 48283, Oct. 14, 1975, as amended by USCG-2000-7641, 66 FR 55573, Nov. 2, 2001; USCG-2004-18939, 74 FR 3382, Jan. 16, 2009]