Section 610 - Disclaimer of power of appointment or other power not held in fiduciary capacityIf a holder that is not a fiduciary disclaims a power of appointment, whether such power is a general power of appointment or a power that is not a general power of appointment, or other power over a trust, granted to the nonfiduciary holder under the terms of an instrument, the following rules apply:
(1) If the holder has not previously exercised the power of appointment or the power over a trust, the disclaimer of a power of appointment or a power over a trust by a holder takes effect as of the time the instrument granting the power to the holder became or becomes irrevocable.(2) If the holder has previously exercised a general power of appointment and the disclaimer is of the right to exercise such general power of appointment, whether or not the holder presently has the power to exercise such general power of appointment, the disclaimer of such power of appointment takes effect immediately after the last time the holder exercised such general power of appointment.(3) If the holder has previously exercised a power of appointment and the disclaimer is of a power of appointment that is not a general power of appointment, whether or not the holder presently has the power to exercise such power of appointment, the disclaimer of such power of appointment takes effect immediately after the last time the holder exercised such power of appointment.(4) If the holder has previously exercised a power over a trust and the disclaimer is of a power over a trust, whether or not the holder presently has the power to exercise such power over the trust, the disclaimer of the power over a trust takes effect immediately after the last time the holder exercised such power over the trust.(5) The instrument granting the power of appointment or power over the trust to the holder shall be construed as if the power of the holder ceased to exist with respect to the power of appointment or power over the trust when the disclaimer became effective.63 Del. Laws, c. 448, §1; 75 Del. Laws, c. 302, § 1.;