Mich. Comp. Laws § 125.1426
The notes and bonds shall be authorized by resolution of the members of the authority; shall bear such date or dates, and shall mature at such time or times, in the case of any note, or any renewal thereof, not exceeding 20 years, from the date of issue of such original note, and in the case of any bond not exceeding 50 years from the date of issue, as the resolution may provide. The notes and bonds shall bear interest at such rate or rates, be in such denominations, be in such form, either coupon or registered, carry such registration privileges, be executed in such manner, be payable in such medium of payment, at such place or places and be subject to such terms of redemption as such resolution or resolutions may provide. The notes and bonds of the authority may be sold by the authority, at public or private sale, at such price or prices as the authority shall determine.
MCL 125.1426