Section 6. Credit of state not to be granted in certain cases

The credit of the state shall not be granted to, or in aid of any county, city, township, corporation or person; nor shall the state ever assume, or become responsible for the debts or liabilities of any county, city, township, corporation or person. The investment of state or public funds shall be subject to procedures and guidelines heretofore or hereafter established by the Legislature for the prudent investment of such funds.