Michigan constitution
The schedule
Section 14

The legislature by a vote of two-thirds of the members elected to and serving in
each house may provide that the state may borrow money and may pledge its full faith and
credit for refunding any bonds issued by the Mackinac Bridge Authority and at the time of
refunding the Mackinac Bridge Authority shall be abolished and the operation of the bridge
shall be assumed by the state highway department. The legislature may implement this
section by law.