C.R.S. § 24-90-119

(1) Except as set forth in subsection (2) of this section, a publicly supported library shall not disclose any record or other information that identifies a person as having requested or obtained specific materials or service or as otherwise having used the library. (2) Records may be disclosed in the following instances: (a) When necessary for the reasonable operation of the library; (b) Upon written consent of the user; (c) Pursuant to subpoena, upon court order, or where otherwise required by law; (d) To a custodial parent or legal guardian who has access to a minor’s library card or its authorization number for the purpose of accessing by electronic means library records of the minor. (3) Any library official, employee, or volunteer who discloses information in violation of this section commits a civil infraction and, upon conviction thereof, shall be punished by a fine of not more than three hundred dollars.