This act and all parts thereof shall only apply to any township in this state having a population of 17,500 or more and an assessed valuation on tangible property in excess of $30,000,000 in current or last taxable year where any such township touches or any line of boundary thereof abuts any part of a city of the first class having a population in excess of 100,000 people, which city also has a municipal water and light plant operated by a board of public utilities. The township board of any such township is authorized to designate, organize and fix the boundaries of special fire protection districts wherein properties predominately used for industrial purposes constitute in the aggregate more than 2/3 of the assessed valuation on tangible property of any such township in the current or last taxable year within such special fire protection district, and such township boards are further authorized to make provision for and to provide extra equipment and additional fire protection at the sole cost of taxpayers in such special districts, subject to the limitations and other provisions of this act.