Any township or townships of the urban class in the state of Kansas is hereby authorized and empowered to make a tax levy in such amount as may be necessary in order to provide the necessary funds for the payment of the township share of registration and election expenses. All money raised by such tax levy shall be credited by the county treasurer to a special fund and the county shall be reimbursed from such fund for the registration and election expenses which it has paid on behalf of such township, but if there be an insufficient amount in such fund to pay the cost chargeable to such township, the county shall be reimbursed for the remainder from the township general fund. If the township does not make the levy authorized by this act, then the county shall be reimbursed for registration and election expenses paid on behalf of such township from the township general fund. No money raised under the tax levy authorized by this act shall be withdrawn from the county treasury by the township and if there be a balance existing therein after the payment of registration and election expenses for any year, the same shall be held in the county treasury to the credit of such township and used to pay registration and election expenses incurred in subsequent years.