Drains: districts; drainage district boundaries; revise under certain circumstances. Amends secs. 135 & 197 of 1956 PA 40 (MCL 280.135 & 280.197).

This bill updates Michigan's Drain Code to streamline the process for changing drainage district boundaries after a county or intercounty drain has been built. It allows landowners, groups of freeholders, or municipalities to petition the drain commissioner to add or remove counties from a district if such changes are needed for public health or welfare. Upon receiving a petition, the drain commissioner must notify relevant officials and convene a drainage board meeting where affected parties can present evidence before a decision is made. If the board approves the change, it determines how construction costs are shared among the counties involved and issues an official order to adjust the district lines. The legislation also clarifies the roles of surveyors and engineers in reviewing boundaries and revising them to include all lands that benefit from the drain.