(a) In any county not operating under the county road unit system, any township in such county, pursuant to a written agreement with the board of county commissioners, may turn over the maintenance, repair and construction of township roads to the county as provided by this subsection. Any such agreement shall specifically state the duration of such agreement. The question of turning over the maintenance, repair and construction of the township roads to the county shall be submitted to a vote of the qualified electors of the township at the general election whenever there shall have been submitted to the board of county commissioners at least 60 days prior to the date of such general election a petition signed by 10% of the qualified electors of such township or a resolution of the township board calling for such election.

(b) Any township which has adopted the provisions of this act may abandon the provisions of this act, and take over the maintenance, repair and construction of township roads, as provided by this subsection. The question of abandoning the adoption of the provisions of this act shall be submitted to a vote of the qualified electors of the township at any general election after the date such township has adopted the provisions of this act, whenever there shall have been submitted to the board of county commissioners at least 60 days prior to the date of any such general election, a petition signed by at least 20% of the qualified electors of such township.