7 Colo. Code Regs. § 1107-5.10
Where an employer lawfully deducts premium contributions from an employee's wages pursuant to C.R.S. § 8-13.3-507(5) or the terms of an approved private plan, then for the purposes of compliance with C.R.S. § 8-4-105, premium contributions are considered wages paid for the benefit of the employee, and collecting such premium contributions does not violate C.R.S. § 8-4-105(2). If an employer deducts premium contributions from an employee's wages, and subsequently receives a refund of premiums paid from the private plan, the employer must distribute the refund proportionately and in accordance with how it was collected. If an employee terminates employment with the employer, any premiums previously deducted remain part of the employer's approved private plan.
7 CCR 1107-5.10