Colorado Revised Statutes Title 40. Utilities § 40-33-106. Attempts to exempt carrier from liability void

Any contract, rule, regulation, or stratagem whatsoever, the purpose or intent of which is to enable any common carrier to exempt itself from any liability created by this article, shall to that extent be void; but in any action brought against any such common carrier under or by virtue of any of the provisions of this article, such carrier may set off therein any sum it has contributed or paid to any insurance, relief benefit, or indemnity that may have been paid to the injured employee, or the person entitled thereto on account of the injury or death for which said action was brought.