The provisions of the International Fuel Gas Code shall apply to the installation of all materials and equipment utilizing natural gas except those regulated by the International Residential Code. (Ord. 2344 § 1 (Exh. A), 2021; Ord. 2052 § 2 (Exh. B), 2010; Ord. 1986 § 1, 2007; Ord. 1926 § 4, 2004).