C.R.S. § 6-2-109
6-2-109. Contract illegal - when
6-2-109. Contract illegal - when. Any contract, express or implied, made by any person, firm, or corporation in violation of any of the provisions of sections 6-2-103 to 6-2-108 is an illegal contract, and no recovery thereon shall be had; except that no part of this article shall prevent the payment of patronage refunds by cooperative agencies or associations existing and operating under the laws of this state.