(a) The following is a regulated navigation area - The Sabine Neches Waterway which includes the following waters: Sabine Pass Channel, Port Arthur Canal, Sabine Neches Canal, Neches River, Sabine River and all navigable waterways tributary thereto.

(b) Unless otherwise authorized by the Captain of the Port, Port Arthur, Texas, tows on a hawser of 1000 gross tons or greater transiting the Sabine-Neches Waterway are prohibited unless such tows have a tug of sufficient horsepower made up to the tow in such a manner as to insure that complete and effective control is maintained throughout the transit. Inbound vessels only, may shift the tow or pick up an additional tug within 100 yards inside the entrance jetties provided that such action is necessary for reasons of prudent seamanship.