Michigan Compiled Laws, Chapter 120. Port Districts § 120.110

(a) Subject to the authority of the federal government and the state and with the agreement of the constituent units, provide for the preservation of navigation within its territorial jurisdiction, including the establishment by regulation of lines beyond which piers, bulkheads, wharves, pilings, structures, obstructions, or extensions of any character may not be built, erected, constructed, or extended; provide by regulation for the stationing, anchoring, and movement of vessels or other watercraft; adopt rules to prevent material, refuse, or matter of any kind from being thrown into, deposited, or placed where it may fall, or be washed, into navigable waters under its jurisdiction; ascertain the depth and course of the channels of those navigable waters; erect and maintain, authorize the erection and maintenance of, and make rules respecting wharves, bulkheads, piers, and piling, and the keeping of the same in repair, to prevent injury to navigation or health; regulate the use of wharves, docks, piers, bulkheads, or pilings owned by it; lease or rent the same, and impose and collect dockage from vessels and watercraft lying at, or using the same; and collect wharfage and other charges upon goods, wares, merchandise or other articles landed at, shipped from, stored on, or passed over the same.

(b) Make and enter into contracts and agreements necessary or incidental to the performance of its duties and the execution of its powers under this act.

(c) Lay out, construct, acquire, operate, lease, sell, and convey planned industrial districts as a part of port facilities within its jurisdiction, subject to the restrictions contained in this act upon operation and ownership of port facilities.

(d) Do all acts and things necessary or convenient to promote and increase commerce and recreation within its territorial jurisdiction and carry out the powers expressly granted and any powers implied or necessary for the exercise of the powers expressly granted in this act.