N.M. Stat. § 3-57-9
Formation of local public bodies.
No local public body shall be organized within a five-mile radius of the corporate
limits of the municipality having the greatest number of inhabitants in a class A county,
unless the governing body of such municipality consents thereto. No local public body
shall be organized beyond such five-mile radius in a class A county, unless the
governing body of such county consents thereto. As a condition to granting such
consent, such governing body may require such new local public body to comply with all
master plans and all design and construction criteria for public improvements adopted
by ordinance by such governing body.