Code of Federal Regulations · Section
§ 153.352 — B/3 And 4 M Venting System Outlets
46 C.F.R. § 153.352
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A B/3 or 4 m venting system outlet must:
(a) Discharge vertically upwards; and
(b) Prevent precipitation from entering the vent system.
Authorizing Statute
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Administration and enforcement33 U.S.C. § 1903
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General regulatory authority49 U.S.C. § 5103
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Regulations46 U.S.C. § 3703