33 C.F.R. § 80.840 – Sabine Pass, TX to Galveston, TX.

(a) A line drawn from the Sabine Pass East Jetty Light to the seaward end of the Sabine Pass West Jetty.
(b) Lines drawn across the small boat passes through the Sabine Pass East and West Jetties.
(c) A line formed by the centerline of the highway bridge over Rollover Pass at Gilchrist.