---
kind: "section"
citation: "33 C.F.R. § 157.166"
title: "33"
number: "157.166"
heading: "Hydrocarbon emissions."
url: "https://uscodex.org/cfr/33/157.166"
---

# §157.166. Hydrocarbon emissions.


If the tank vessel having a COW system under [§ 157.10a(a)(2)](/cfr/33/157.10a.md?p=a-2) or [§ 157.10c(b)(2)](/cfr/33/157.10c.md?p=b-2) transfers cargo at a port in the United States that is in an area designated in [40 CFR part 81](/cfr/40/part81.md) as an area that does not meet the national primary ambient air quality ozone standard under [40 CFR part 50](/cfr/40/part50.md), issued under the Clean Air Act, as amended ([42 U.S.C. 1857](/usc/42/1857.md)), the master of the vessel shall ensure that when cargo tanks are ballasted in that port the hydrocarbon vapors in each tank are contained by a means under [§ 157.132](/cfr/33/157.132.md).


## Notes

### Amendments

[CGD 82-28, 50 FR 11628, Mar. 22, 1985]

### Source

Source: CGD 77-058b, 45 FR 43709, June 30, 1980, unless otherwise noted.

### 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 82-28, 50 FR 11628, Mar. 22, 1985]