O.C.G.A. § 12-5-292

A copy of every permit issued to an applicant shall be prominently displayed within the area of proposed activity. If the committee deems it advisable, the applicant may be required to cause a sign to be erected bearing the permit number, date of issuance, name of applicant, and such other information as the committee may reasonably require. The committee may specify the type of sign to be erected and may designate, within reasonable dimensions, the size of the sign.