(1) The legislative bodies of local, political subdivisions may enter into associations and, through a representative of the association, attend the general assembly of the state of Colorado and the United States Congress and any committees thereof, and present information to aid the passage of legislation which the association deems beneficial to the local agencies in the association or to prevent the passage of legislation which the association deems detrimental to the local agencies in the association. The cost and expense incident thereto are proper charges against the local agencies comprising the association; but proper expenditures of the association shall include only the actual and necessary expenses for one representative of each association and shall not include any expenditures for expenses, travel, or entertainment of any persons other than the representative of the association.
(2) "Local agency", as used in this part 4, means county, city, or city and county. "Legislative body", as used in this part 4, means board of county commissioners in the case of a county or city and county and city council or board of trustees in the case of a city or town.