When in case of emergency, it becomes necessary to open or remove a maintenance hole cover immediately to inspect, repair, adjust or renew any cable wire, pipe, valve, instrument or apparatus installed or contained in any such maintenance hole, the cover thereof may be opened or may be removed for a period of time actually necessary for such inspection, repair, adjustment or renewal, during which period of time a watchperson or guard shall be kept in constant attendance at the exposed opening of the maintenance hole.
Any person who has, in case of emergency, opened the cover of any maintenance hole, must; within forty-eight (48) hours after the time of said emergency opening, report the location of such maintenance hole and the approximate time of such opening to the Board or the person having ownership or control of such maintenance hole.