5 Colo. Code Regs. § 1002-84.13
Violations of this regulation by Treaters and Users shall be subject to enforcement by the Division pursuant to Part 6 of the CWQCA. A Treater shall not be subject to enforcement based solely on a violation by a User. A Treater is required by this regulation to develop and implement a reuse system management plan that meets the requirements of section 84.6 to ensure User compliance with this regulation, and may be subject to enforcement for violations associated with failure to implement this program based on evidence that may include evidence of violations by User. A User shall not be subject to enforcement for a violation by a Treater; a Treater shall be solely responsible for its compliance with the terms and conditions imposed upon treaters. However, if a User was aware of the violation and did not report it as required in subsection 84.11 , the User may be subject to an enforcement action for failure to report the violation.
5 CCR 1002-84.13