No rate or charge shall be applied against any vessel, owner or master thereof, by a registered pilot which differs from the rates and charges set forth in this part, nor shall any rates or charges be made for services performed by a registered pilot, or for support services directly related to the provision of pilotage that a registered pilot requires a vessel to utilize, other than those for which a rate is prescribed in this part, without the approval of the Director.
46 C.F.R. §401.430