N.M. Stat. § 4-49-7
General obligation bonds; authority to issue.
The boards of county commissioners may issue the general obligation bonds of the
county in any sum necessary, not greater than four percent, inclusive of all other
bonded indebtedness, of the assessed value of the taxable property of the county, for
the purpose of building courthouses, jails, bridges, hospitals, public libraries, facilities for
the holding of county fairs, cultural facilities, purchasing books or other library
resources, building juvenile detention homes, athletic facilities, parking structures,
administrative facilities, facilities for housing equipment, repairing equipment and
servicing equipment and sewerage facilities, constructing or repairing public roads and
for construction and acquisition of water, sewer or sanitary landfill systems and airports.