Section 66. Any owner, operator or person in charge of an elevator or any person employed to inspect, repair or install an elevator shall immediately, if an accident occurs during such installation or repair, of if he thinks such elevator is unsafe, make a written report thereof to an inspector assigned by the commissioner, who shall forthwith inspect such elevator. If an accident occurs to an elevator, the operator, person in charge or owner having knowledge thereof shall immediately report such accident to an inspector assigned by the commissioner, who shall forthwith inspect such elevator. Upon completion of his inspection, said inspector shall upon request provide a copy of any accident report received by him in accordance with this section to each person who reported, or was involved in the accident so reported, and said inspector shall obtain a receipt for each report so provided.