Michigan Compiled Laws, Chapter 247. Highways § 247.668i

Sec. 18i. The provisions of this act shall be construed as cumulative authority for the exercise of the bonding powers herein granted and shall not be construed to repeal any existing laws with respect thereto, it being the purpose and intention of this act to create full and complete additional and alternate methods and means for the exercise of such powers. The powers conferred by this act shall not be affected or limited by any other statute or by any charter, except as otherwise herein provided.