All signs must be kept clean, neatly painted and free from all hazards, such as but not limited to faulty wiring, loose fittings or fixtures, and must be maintained at all times in such safe condition as not to be detrimental to the public health and safety. In the event of a violation of any of the foregoing provisions, the Codes Enforcement Officer shall give written or personal notice specifying the violation to the named owner of the sign and the named owner of the land upon which the sign is erected, sent to the addresses as stated in the application for the sign permit, to conform or remove such sign. The sign shall thereupon be conformed by the owner of the sign and the owner of the land within 30 days from the date of said notice. In the event that such sign shall not be conformed within 30 days, the Codes Enforcement Officer shall thereupon revoke the permit, and such sign shall be removed by the named owner of the sign and/or the named owner of the land. The Codes Enforcement Officer may cause any sign which is a source of immediate peril to persons or property to be removed summarily and without notice and shall charge all costs and expenses incurred in said removal against the owner of the sign or the owner of the property on which said sign is located. Said expenses may be charged as a lien against the real property.