N.M. Stat. § 3-52-15
Any municipality desiring to qualify for a grant under the Urban Mass Transportation Act of 1964 (being Public Law 88-365, 88th Congress) may in order to meet the requirements of Section 10, Paragraph (c) of that act, recognize, and enter into collective bargaining with, an appropriate union representing employees of such municipal transit system with regard to the preservation of employee rights, privileges and benefits under any existing collective bargaining agreements or otherwise; the continuation of collective bargaining rights; the protection of individual employees against a worsening of their positions with respect to their employment; assurances of employment to employees of acquired mass transportation systems and priority of reemployment of employees terminated or laid off; and paid training or retraining programs.
NMS § 3-52-15