(a) It shall not apply to a county wholly contained within a city, unless specifically so provided;

(b) The provisions of this chapter in so far as they are in conflict with or in limitation of a provision of any alternative form of county government heretofore or hereafter adopted by a county pursuant to section two of article nine of the constitution, or any administrative code, county government law or civil divisions act enacted by the legislature and applicable to such county as now in force or hereafter amended, or in conflict with any local law heretofore or hereafter adopted by a county under an optional or alternative form of county government, shall not be applicable to the county, unless a contrary intent is expressly stated in this chapter.