(1) "Local government" means any authority, county, municipality, city and county, district, or other political subdivision of the state of Colorado, any institution, department, agency, or authority of any of the foregoing, including any county or municipal housing authority; and any other entity, organization, or corporation formed by intergovernmental agreement or other contract between or among any of the foregoing. Effective January 1, 1990, the office of the county public trustee shall be deemed an agency of the county for the purposes of this part 5. "Local government" does not include the fire and police pension association, any public entity insurance pool formed pursuant to state law, the university of Colorado hospital authority created in section 23-21-503, or any association of political subdivisions formed pursuant to section 29-1-401.