The rates, charges, rules and regulations contained in this Tariff, or as amended, shall apply to all waterways and facilities under the jurisdiction of the Port Authority.
Rates and charges applicable shall be those in effect at time service is performed. Revisions shall be issued to cover changes in this Tariff, and all rates, charges, rules and regulations are subject to change without notice, except as may be required by law.
Except as otherwise provided, rates and charges in this Tariff are stated in dollars and cents per net ton of 2,000 pounds
28 Miss. Code. R. § 1-02-202