The International Fuel Gas Code, 2021 Edition, as published by the International Code Council, and the International Code Council 2002 Accumulative Supplement to the International Fuel Gas Code are hereby adopted as the “Moline Fuel Gas Code,” and are incorporated herein by reference thereto as if they were set out in haec verba. Three (3) copies of such Code shall be kept on file in the city clerk’s office for inspection and shall remain on file therein for such purposes.