As soon as the harbour or dock shall be so far completed as to admit vessels to enter therein, no vessel, except with the permission of the harbour master, shall lie or be moored in the entrance of the harbour or dock, or within the prescribed limits; and if the master of any vessel either place it or suffer it to remain in the entrance of the harbour or dock, or within the prescribed limits, without such permission, and do not, on being required so to do by the harbour master, forthwith proceed to remove such vessel, he shall be liable to a penalty not exceeding F1level 1 on the standard scale, and a further sum of F2£1 for every hour that such vessel shall remain within the limits aforesaid, after a reasonable time for removing the same has expired after such requisition.