Colorado Revised Statutes Title 24. Government State § 24-4-104.5. Permits--rules in effect at time of submission of application for a permit control

(1) For purposes of this section, unless the context otherwise requires, “permit” means a grant of authority by an agency that authorizes the holder of the permit to do some act not forbidden by law but not allowed to be performed without such authority. “Permit” does not include a professional license issued by a licensing board or an agency to conduct a profession or occupation. “Permit” does not include a registration or certification issued by a board or state agency to an individual to pursue a profession, practice, or occupation. “Permit” does not include a water well permit issued by the state engineer pursuant to title 37, C.R.S.

(3) If an agency adopts or amends rules that govern or impact the application process or any permit eligibility requirements after a person has applied for a permit or renewal of a permit and while the application is pending with the agency, the person shall have the option to have the application processed under the rules in existence at the time of the filing of the application or under the new rules.