When a sign which is the subject of the issuance of a permit and tag is not erected at the date of such issuance, such sign must be erected within one hundred twenty (120) days after such issuance, with the tag properly affixed, or the permit and tag shall be void. Upon written request to the department, a one-time sixty (60) day extension to erect a previously permitted sign may be granted.
N.M. Admin. Code § 18.21.5.27