Same; tax levies by townships; election

For the purpose of paying the cost of contracting for or joining in the establishment of a department for the purpose of providing such special law enforcement, the township board is hereby authorized to levy a tax of not to exceed two mills upon all taxable tangible property within such township to pay the costs thereof: Provided, That no levy shall be made under the provisions of this section without the question of levying the same having been submitted to and been approved by a majority of the electors of the township voting at an election called and held for such purpose. All such elections shall be noticed, called and held in the manner provided for the giving of notice, calling and holding elections upon the question of the issuance of bonds under the general bond law.