C.R.S. § 15-15-408

(1) A joint tenant of an interest in real property may use the procedures described in this part 4 to transfer his or her interest effective upon the death of such joint tenant. However, title to the interest shall vest in the designated grantee-beneficiary only if the joint tenant-grantor is the last to die of all of the joint tenants of such interest. If a joint tenant-grantor is not the last joint tenant to die, the beneficiary deed shall not be effective, and the beneficiary deed shall not make the grantee-beneficiary an owner in joint tenancy with the surviving joint tenant or tenants. A beneficiary deed shall not sever a joint tenancy. (2) As used in this section, “joint tenant” means a person who owns an interest in real property as a joint tenant with right of survivorship.