Tex. Transp. Code § 71.155

A person, other than a pilot, who provides pilot services to a vessel under way or otherwise moving for which a pilot is required out of or into a port, channel, or waterway under the exclusive jurisdiction of the pilot board of a navigation district in Cameron County is liable to any pilot authorized to provide pilot services in the port, channel, or waterway for a payment of twice the current rate that would be charged under the pilot's schedule of pilotage rates for the pilot services.