Michigan Compiled Laws, Chapter 324. Natural Resources and Environmental Protection § 324.14806

Sec. 14806. (1) A person asserting the privilege under this part has the burden of proving a prima facie case as to the privilege. A person seeking disclosure of an environmental audit report has the burden of proving by a preponderance of the evidence that privilege does not exist under this part.

(2) The parties disputing the existence of the privilege may at any time stipulate to entry of an order directing that specific information contained in an environmental audit report is or is not subject to the privilege.

(3) Upon making a disclosure determination under section 14804 or 14805,  1 the court may compel the disclosure only of those portions of an environmental audit report relevant to issues in dispute in the proceeding.