Section 72. No cinematograph or similar apparatus, thirty-five millimeter or larger, involving the use of so-called safety film shall be kept or used for the purpose of exhibiting such films in or upon the premises of a public building until a booth or enclosure, which has been inspected and approved by an inspector and his certificate issued therefor, has been provided; nor until such precautions against fire as the commissioner of public safety may specify have been taken by the owner, user, or exhibitor.