Any sign shall be inspected at least once in every year. When a sign is found unsafe, defective, or unsatisfactory in any way, or in case any person refuses or fails to pay the license fee imposed by this chapter, the Building Commissioner shall have the authority to remove, or cause to be removed, any sign after first giving a five-day written notice to the person having any such unsatisfactory sign to remove it. The expense of removal, if by the city or its Building Commissioner, shall be recovered from any person having the sign removed.
('67 Code, § 110.14)