After the adoption of the regional plan by the regional planning commission, no street, park, or other public way, ground or open space, public building or other public structure and public utility, whether publicly or privately owned or operated, shall be constructed or authorized in nonmunicipal territory within the region until the location, character, and extent thereof shall have been submitted to and approved by the regional planning commission of the region. This prohibition shall not be interpreted as requiring the approval by the regional planning commission of any subdivision falling within the subdivision jurisdiction of a municipal planning commission as defined in Section 11-52-30, and duly approved by such municipal planning commission as provided in Section 11-52-32. In case of disapproval by the regional planning commission, such disapproval may be overruled by the board, commission, body or officer in which or in whom the power to finally determine such location, character and extent is reposed by law by a vote, in the case of any such board, commission or body, of not less than two thirds of its membership. A statement of its or his reason for any such overruling shall be spread upon the minutes or records of the board, commission, body or officer.