No person, either in person or through an agent, employee, or contractor, shall make, allow or cause to be made any sewer connection to the POTW for service, or for the purpose of servicing property outside the boundaries of the POTW, except upon recommendation of the POTW Manager and the express approval of the POTW’s governing board. Such connection to the POTW shall be made by a person who is either a bonded, state-licensed sewer contractor or a plumber who has obtained the necessary permits.