Yard sale signs. These signs may be used in connection with the conduct of any private sale. Not more than two signs advertising such private sales shall be permitted. They shall be placed only on the premises on which the private sale is to be held. The placement of any such sign upon any other property, public or private, is expressly prohibited. The size of these types of signs shall not exceed 10 square feet. These signs must comply with Chapter 222, Article I, of the Code of the Borough of Clementon.