Mich. Comp. Laws § 330.1832
The department and community mental health services programs shall inform responsible parties whose ability to pay was determined under section 818 that if they believe that the income figure being utilized to determine their ability to pay is not appropriate to their current income status or does not appropriately reflect their ability to pay, they may request the department or community mental health services program to make a new determination of ability to pay, and the department or community mental health services program shall be required to do so. If a responsible party has stated that the income figure being utilized is not appropriate to his or her current income status, the department or community mental health services program shall make a new determination of ability to pay based on the responsible party's current annualized Michigan taxable income. If this is not available, other documentation of income as described in section 818(1)(b) shall be used. If a responsible party has stated that the income figure being utilized does not appropriately reflect his or her ability to pay, the department or community mental health services program shall make a new determination of ability to pay based on a consideration of the responsible party's total financial situation as described in section 819. In neither instance, however, shall the new determination of ability to pay be for an amount greater than the original determination.
MCL 330.1832