New Mexico Statutes 10-7E-24. Existing collective bargaining units
A. Bargaining units established prior to July 1, 1999 shall continue to be recognized as appropriate bargaining units for the purposes of the Public Employee Bargaining Act. Bargaining units established between July 1, 1999 and the effective date of that act shall continue in effect only if the unit is covered by a collective bargaining agreement on the date of this act.
B. A labor organization that was recognized by a public employer as the exclusive representative of an appropriate bargaining unit on June 30, 1999 shall be recognized as the exclusive representative of the unit on the effective date of the Public Employee Bargaining Act; provided, however, that the public employer shall not enter into a new collective bargaining agreement pursuant to this subsection unless the labor organization demonstrates majority support to the public employer pursuant to section 14 [10-7E-14 N.M. Stat. Ann.] of the Public Employee Bargaining Act. A labor organization which attempts and fails to show majority support shall no longer be recognized as the exclusive bargaining representative of that unit.