C.R.S. § 15-2.5-404
15-2.5-404. Revocation or amendment of release
15-2.5-404. Revocation or amendment of release. (1) A powerholder may revoke or amend a release of a power of appointment only to the extent that:
(a) The instrument of release is revocable by the powerholder; or
(b) The powerholder reserves a power of revocation or amendment in the instrument of release.