Prior to the completion of construction work relating to the development of a Building Lot or the construction of a building, a Real Estate Broker is not to conclude an agreement for the sale or exchange of the Building Lot or building pertaining to said construction work as a party thereto or as an agent of a party thereto or mediate for said sale or exchange unless such permission as provided for in Article 29, paragraph (1) or (2) of the Urban Planning Act, verification as provided for in Article 6, paragraph (1) of the Building Standards Act, or any other permission or disposition based on a law or regulation required in connection with said construction work that is as specified by Cabinet Order has been granted.