Revocation of permit. No sign, whether new or existing, shall hereafter be erected or altered, except in conformity with any provisions of this chapter. However, notwithstanding any provisions contained herein, the sign must be kept clean, neatly painted and free from all hazards, such as but not limited to faulty wiring, loose fastenings, and must be maintained at all times in such safe condition so as not to be detrimental to the public health or safety. In the event of a violation of any of the foregoing provisions, the Township shall give written or personal notice specifying the violation to the named owner of the sign and the named owner of the land on which the sign is erected, sent to the addresses as stated in the application for the sign permit, to conform or remove such signs. 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 such sign shall not be made to conform within 30 days, the Township 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.