This part and all of its provisions shall be liberally construed to the end that its purpose may be effective. Any proceedings taken pursuant to this part shall not be held invalid for failure to comply with the provisions of this part, if the acts done and proceedings taken are not invalid under the State or Federal Constitutions.

This part does not affect any other law relating to the same or similar subject, but provides an alternative procedure for the subject to which it relates. When proceedings are taken under this part, its provisions only shall apply. The Special Assessment Investigation, Limitation and Majority Protest Act of 1931 shall not apply to any proceedings taken under this part nor to any proceedings taken under any other law for the improvement of a pedestrian mall.