“Local public body” means every political subdivision of the state that expends public money from whatever source derived, including counties, county institutions, boards, bureaus or commissions; incorporated cities, towns or villages; drainage, conservancy, irrigation or other districts; charitable institutions for which an appropriation is made by the legislature; and every office or officer of any of the above. “Local public body” does not include a mutual domestic water consumers association, a land grant, an incorporated municipality or a special district with an annual revenue, exclusive of capital outlay funds, federal or private grants or capital outlay funds disbursed directly by an administrating agency, of less than fifty thousand dollars ($50,000), nor county, municipal, consolidated, union or rural school districts and their officers or irrigation districts organized under Sections 73-10-1 through 73-10-47 N.M. Stat. Ann..