The powers of the city shall be exercised in accordance with the provisions of this Charter. If this Charter does not provide a procedure for the exercise of any power granted to the city, then a procedure for the exercise of that power contained in a Michigan statute may be invoked by the Commission. If alternate procedures exist under the statutes, the Commission shall select the procedure to be followed. If neither this Charter nor state statutes provide a procedure for the exercise of any power granted to the city, the Commission shall prescribe by ordinance or resolution a procedure for the exercise of the power.