The edition of the International Building Code currently, or hereafter, adopted and amended by the State Building Code Council and included in Title 51 of the Washington Administrative Code, including Appendix Chapters C, E, G, H, and I, are adopted as the Building Code for the unincorporated areas of Pierce County, except that the amendments to the International Building Code in this Chapter shall govern over the published provisions of the International Building Code. The effective date of subsequent editions of the International Building Code in Pierce County shall coincide with the effective date of their adoption and amendment by the State Building Code Council.