46 C.F.R. § 42.07-15 Zones and seasonal areas.
Title 46 - Shipping
(a) A vessel subject to 46 U.S.C. 5101–5116 or the 1966 Convention shall comply, as applicable, with the requirements regarding the zones and seasonal areas described in subpart 42.30. (b) A port located on the boundary line between two zones or areas shall be regarded as within the zone or seasonal area from or into which the vessel arrives or departs. [CGFR 68–60, 33 FR 10053, July 12, 1968, as amended by USCG–1998–4442, 63 FR 52190, Sept. 30, 1998]
Title 46: Shipping
PART 42—DOMESTIC AND FOREIGN VOYAGES BY SEA
Subpart 42.07—Control, Enforcement, and Rights of Appeal
§ 42.07-15 Zones and seasonal areas.

