In the event of a grounding or a collision between two vessels or between a vessel and any wharf, dock, pier, or any structure owned by the Port Authority, written report of such collision or grounding, shall within twenty-four hours, be furnished the Executive Director by the master, owner or agent of said vessel, provided that in the case of a minor collision where a vessel is underway and proceeding to the open seas, there being no need of repair to Port facilities, vessel (s) or environmental resources, said report may be mailed by the master of such vessel from the next port which it enters, and provided further that in all cases of collision or grounding, report of an owner or agent shall not relieve the pilot of the duty of rendering his report within the specified time.