No such gathering or entertainment shall be held or presented in any premises other than a building as described in § 113.110, unless such premises have been examined by the Fire Chief or Zoning Administrator not more than three days before the date of such gathering and found to be free from any fire hazard and to be suitable for the purpose. No structure enclosed by a roof shall be used for such purpose unless the same is constructed of nonflammable materials; provided that tents or structures covered by canvas or similar materials may be so used if such canvas or other material have been properly treated so as to be rendered fire-resistive.
('70 Code, § 10.4.2) Penalty, see § 113.999