C.R.S. § 4-8-603

(a) This article does not affect an action or proceeding commenced before this article takes effect. (b) If a security interest in a security is perfected at the date this article takes effect, and the action by which the security interest was perfected would suffice to perfect a security interest under this article, no further action is required to continue perfection. If a security interest in a security is perfected at the date this article takes effect but the action by which the security interest was perfected would not suffice to perfect a security interest under this article, the security interest remains perfected for a period of four months after the effective date and continues perfected thereafter if appropriate action to perfect under this article is taken within that period. If a security interest is perfected at the date this article takes effect and the security interest can be perfected by filing under this article, a financing statement signed by the secured party instead of the debtor may be filed within that period to continue perfection or thereafter to perfect.