C.R.S. § 15-11-1210
15-11-1210. Disclaimer by appointee, object, or taker in default of exercise of power of app
15-11-1210. Disclaimer by appointee, object, or taker in default of exercise of power of appointment. (1) A disclaimer of an interest in property by an appointee of a power of appointment takes effect as of the time the instrument by which the holder exercises the power becomes irrevocable.
(2) A disclaimer of an interest in property by an object or taker in default of an exercise of a power of appointment takes effect as of the time the instrument creating the power becomes irrevocable.