Any owner or lessee of property to which a nonconforming sign or device is attached shall furnish to the city engineer, upon request in writing, the date of the erection or installation of such sign or device.
A false statement knowingly given by the owner or lessee or failure to furnish such information within five days of the receipt of such request constitutes a waiver of any rights granted to any property owner or lessee as to the maintenance of any nonconforming sign or device by this chapter and such sign or device shall be removed or altered to conform within thirty days after demand that such be done in writing by the city engineer regardless of the ownership or the date of installation of such sign or device. (Ord. 69-17 § 3, 1969).