N.M. Code R. § 18.21.5.14
D. Conversion.
(1) An existing static outdoor advertising device may be converted to a changeable electronic variable message sign, provided the existing sign:
(a) has been approved by the local government;
(b) is a legal, conforming sign;
(c) is in good repair;
(d) has had all permit fees timely paid; and
(e) does not violate any applicable sections of this rule or of the Beautification Act.
(2) No existing static outdoor advertising device may be converted to changeable electronic variable message sign technology if the existing sign has a non-conforming or grandfathered status.
(3) The conversion of a static outdoor advertising device to a changeable electronic variable message sign must be approved by the applicable local governmental entity.
(4) The application shall include written assurance from the applicant that the sign structure will meet or exceed current engineering standards or practices and all applicable building codes.
(5) The conversion of a static outdoor advertising device to a changeable electronic variable message sign must be accomplished within one hundred twenty (120) days after the issuance of the applicable permit.
[18.21.5.14 NMAC - N, 02/14/14]