A. "local public body" means all political subdivisions, except municipalities and school districts, of the state and their agencies, instrumentalities and institutions;B. "state agency" means the state of New Mexico or any of its branches, agencies, departments, boards, instrumentalities or institutions other than state educational institutions;C. "state educational institutions" means those institutions designated by Article 12, Section 11 of the constitution of New Mexico; andD. "school districts" means those political subdivisions of the state established for the administration of public schools, segregated geographically for taxation and bonding purposes and governed by the Public School Code [Chapter 22 NMSA 1978].