On and after the First Day of January One thousand eight hundred and sixty-two, all Vessels exceeding Ten Tons entering or leaving the Harbour of Whitby shall pay to the Trustees of Whitby Harbour such Sum or Toll, not exceeding One Penny per Ton, as such Trustees may from Time to Time direct to be paid to them, for the Support, Maintenance, and Improvement of the existing or any future Tide Lights at the Entrance of the Harbour: Provided always, that any Vessel which shall have paid such Toll on entering the Harbour may again leave the Harbour without further Payment of Toll.