C.R.S. § 38-33.5-105

(1) Every stockholder of a cooperative housing corporation shall be entitled to receive from the corporation a proprietary lease or right of tenancy document which shall include the following provisions: (a) That no sublease in excess of one year, amendment, or modification to such proprietary lease or right of tenancy in the property shall be permitted or created without the lender’s prior written consent; and (b) That the security for a loan against the tenant-stockholder’s interest shall be in the nature of a real property security interest, and any default of such loan shall entitle the lender to treat such default in the same manner as a default of a loan secured by real property.