Mich. Comp. Laws § 120.34
The commission shall on or before September 1 of each year submit a written report to the governor, the legislature, the public service commission, and the governing body of the cities or townships or the board of supervisors of the county or counties of the port district, which report shall contain a statement of the doings of the port commission during the preceding calendar year and such recommendations as to legislation as in the opinion of the commission may be necessary or expedient to enable the commission better to administer the affairs of the port district and to carry out the purposes for which the port district was enacted. In port districts coterminous with a county the commission shall also file with the board of supervisors of the county on or before September 1 of each year a budget setting out in detail its program for the ensuing year, together with the several amounts estimated by the commission to be necessary for the purposes indicated therein. The board of supervisors may decrease the budget proposed by the commission and also eliminate specific items. In port districts coterminous with 2 or more counties, the boards of supervisors of the counties included in the port district shall appoint a port district budget committee composed of not more than 15 members of the boards of supervisors. Representation on the port district budget committee from each county in the port district shall be, as near as may be, in proportion to the state equalized value of the county in relation to the total state equalized value of the port district. The port district budget committee shall review the budget request of the commission and recommend to the boards of supervisors of the counties in the port district the budget for the port district. The boards of supervisors may decrease the budget recommended by the port district budget committee and also eliminate specific items. The budget shall be approved by boards of supervisors with 66-2/3% of the state equalized value of the total port district and the budget as approved shall be reported to the port district budget committee and port commissions, and shall become final and binding on the boards of supervisors of all the counties in the port district, and the boards of supervisors shall appropriate their proportionate share of the total budget for the port district. The budget shall be apportioned between the counties in proportion to the state equalized value of the county in relation to the total state equalized value of the port district. No money shall be expended by the commission for any purpose not included in the budget as approved by the port district budget committee and the boards of supervisors of the county or counties in the district. In port districts coterminous with a county, all disbursements shall be made by the county treasurer on warrants drawn by the board of county auditors, or in port districts having no board of county auditors on warrants drawn by the county clerk, upon order of vouchers approved by the port commission. In port districts of 2 or more counties, disbursements shall be made by the county treasurer designated by the commission subject to the same conditions imposed on the county treasurer of a port district coterminous with 1 county. Port districts coterminous with a city or township shall follow the same procedure, as near as may be, substituting the local governing body and local officers where applicable for the board of supervisors and county officials, and be subject to the same conditions as set forth for county port districts, and port districts coterminous with 2 or more cities or townships shall in the same manner follow the procedure as near as may be and be subject to the same conditions as set forth for port districts coterminous with 2 or more counties.
MCL 120.34