The price of telecommunications services or products which are not subject to the jurisdiction of the commission shall not be priced below cost by use of subsidization from customers of services and products subject to the jurisdiction of the commission, and any such cross-subsidization is deemed to be an illegal restraint of trade subject to the provisions of article 4 of title 6, C.R.S.L. 87: Entire article R&RE, p. 1479, § 1, effective July 2.