Colorado Revised Statutes Title 38. Property Real and Personal § 38-42-102. Option void, when

Any such right or option contained in any oil and gas or mining lease which is executed subsequent to March 2, 1955, and the title or heading of which does not clearly state that such a right or option is contained therein shall be voidable at the option of the lessor, and upon adjudication by a court of competent jurisdiction that such right or option is voided by virtue of this article, no money paid to the lessor for such lease shall be returned to the lessee therein, but the failure of such lease to satisfy the requirements of this article shall not affect the validity of such lease except as to such right or option to purchase.