Wherever the right of expropriation has been, or may be, exercised in the location of a canal for the transportation of vessels or carriers, the owners thereof, or those in control thereof, shall not charge for the transportation, or passage through the canal, of any boat or vessel belonging to the State of Louisiana, or any board or commission or subdivision thereof, more than five cents per linear foot of the boat or vessel, for a single passage one way.
La. Navigation and Shipping § 34:345