(a) Subject to the overriding provisions of § 3.40-5, Sector New Orleans' Marine Inspection Zone and Captain of the Port Zone starts at latitude 30°10′00″ N, longitude 89°10′00″ W; thence west along latitude 30°10′00″ N to longitude 89°31′48″ W; thence north along longitude 89°31′48″ W to the west bank of the Pearl River (at the mouth of the river); thence north along the west bank of the Pearl River to latitude 31°00′00″ N; thence west along latitude 31°00′00″ N to the east bank of the Mississippi River; thence south along the east bank to mile 303.0, thence west to the west bank at mile 303.0; thence north to the southern boundary of the Old River Lock Structure, thence west along the south bank of the Lower Old River, to the intersection with the Red River; thence west along the south bank of the Red River to Rapides Parish, thence south along the western boundaries of Avoyelles, Evangeline, Acadia and Vermillion Parishes to the intersection of the sea and longitude 92°37′00″ W; thence south along longitude 92°37′00″ W to the outermost extent of the EEZ; thence east along the outermost extent of the EEZ to longitude 88°00′00″ W; thence north along longitude 88°00′00″ W to latitude 29°00′00″ N; thence northwest to latitude 30°10′00″ N, longitude 89°10′00″ W; and in addition, all the area described in paragraph (b) of this section.

(b) The boundaries of the MSU Houma Marine Inspection and Captain of the Port Zones start at latitude 28°50′00″ N, longitude 88°00′00″ W.; thence proceeds west to latitude 28°50′00″ N., longitude 89°27′06″ W.; thence northwest to latitude 29°18′00″ N, longitude 90°00′00″ W; thence northwest along the northern boundaries of Lafourche, Assumption, Iberia, and St. Martin Parishes, Louisiana; thence northwest along the northern boundary of Lafayette and Acadia Parishes, Louisiana; thence south along the west boundary of Acadia and Vermillion Parishes, Louisiana to the Louisiana Coast at longitude 92°37′00″ W, thence south along longitude 92°37′00″ W to the outermost extent of the EEZ; thence east along the outermost extent of the EEZ to longitude 88°00′00″ W.; thence north to latitude 28°50′00″ N, longitude 88°00′00″ W.