(a) All gas piping, tubing, fittings, accessories, appurtenances, and gas appliances shall be of a type approved by the Board of Building Standards and Building Appeals or Ohio Board of Building Standards. Piping, tubing, fittings, accessories, appurtenances and gas appliances which conform to the standards hereinbefore specified and which have been approved by the Underwriters’ Laboratories, Inc. or the American Gas Association, or which have been approved by other nationally recognized testing laboratory which possesses adequate equipment, experience, and competency in this field, may be approved by the Board without additional test.
(b) No person, firm, association or corporation shall display, sell, barter, replace, offer for sale, deal in, supply, rent, donate, connect, or install within the City any piping, tubing, fitting, accessory, appurtenance, or gas appliance which has not been approved by the Cleveland Board or the Ohio Board of Building Standards and which does not bear the seal of approval or listing symbol prescribed or accepted by such Boards.