Colo. Const. art. XXIX, § 2

As used in this article, unless the context otherwise requires:

(1) "Government employee" means any employee, including independent contractors, of the state executive branch, the state legislative branch, a state agency, a public institution of higher education, or any local government, except a member of the general assembly or a public officer.

(2) "Local government" means county or municipality.

(3) "Local government official" means an elected or appointed official of a local government but does not include an employee of a local government.

(4) "Person" means any individual, corporation, business trust, estate, trust, limited liability company, partnership, labor organization, association, political party, committee, or other legal entity.

(5) "Professional lobbyist" means any individual who engages himself or herself or is engaged by any other person for pay or for any consideration for lobbying. "Professional lobbyist" does not include any volunteer lobbyist, any state official or employee acting in his or her official capacity, except those designated as lobbyists as provided by law, any elected public official acting in his or her official capacity, or any individual who appears as counsel or advisor in an adjudicatory proceeding.

(6) "Public officer" means any elected officer, including all statewide elected officeholders, the head of any department of the executive branch, and elected and appointed members of state boards and commissions. "Public officer" does not include a member of the general assembly, a member of the judiciary, any local government official, or any member of a board, commission, council or committee who receives no compensation other than a per diem allowance or necessary and reasonable expenses.