The loading, unloading, or handling of cargo must be performed by a stevedore, marine terminal operator duly licensed for Port Manatee. The practice in this Port is for the licensed stevedore/terminal operator to perform vessel and terminal cargo handling. Charges for handling shall be billed by stevedores/terminal operators directly for whom these services are performed. The Port Authority does not participate in negotiations relative to cargo handling charges and inquiries should be directed to licensed stevedores/terminal operators on Tariff filed separately by the stevedores/terminal operators as required by the F.M.C., such as the marine terminal operators identified in sub-rule 280.