46 CFR 7.105 : Shipping (§ 1.01-05 To Subchapter D) — (§ 1.01-05 To Part 40) — Coast Guard, Department Of Homeland Security (§ 1.01-05 To Part 40) — Procedures Applicable To The Public (§ 1.01-05 To § 9.17) — Boundary Lines (§ 7.1 To § 7.180) — Gulf Coast (§ 7.105) — Marquesas Keys, FL to Rio Grande, TX.

A line drawn from Marquesas Keys, Florida at approximate position latitude 24°47.5′ N, longitude 82°11.2′ W; along the 12-mile line which marks the seaward limits of the territorial sea (as defined in 33 CFR 2.22(a)(1)) to Rio Grande, Texas at approximate position latitude 25°58.6′ N, longitude 96°55.5′ W.