Mich. Comp. Laws § 254.12

Sec. 12. The state highway commissioner shall also determine the quota or proportion which each township, city and village named shall contribute thereto, and whether the whole amount shall be raised the first year, or only a part, and, if only a part, what part the first and what part the second year, but no part of it shall be deferred more than 2 years. He shall also determine the quota of each towards keeping the same in repair, which shall remain the same till altered by him, or by the consent of each township, city and village, which is a party to such proceedings.