There is adopted for the purpose of prescribing regulations governing conditions hazardous to life and property from fire and explosion in all of the unincorporated areas of Pierce County, and in the incorporated towns and cities of the County where requested and agreed to by contract, the edition of the International Fire Code currently or hereafter, adopted and amended by the State Building Code Council and included in Chapters 51-54 Washington Administrative Code. The effective date of subsequent editions of the International Fire Code in Pierce County shall coincide with the effective date of their adoption and amendment by the State Building Code Council.