N.Y. EPTL 10-10.7
Unless contrary to the express provisions of an instrument affecting the disposition of property, a joint power other than a power of appointment but including a power in a trustee to invade trust principal under section 10-6.6 of this article or under the terms of the disposi tive instrument, conferred upon three or more fiduciaries, as that term is defined in 11-1.1, by the terms of such instrument, or by statute, or arising by operation of law, may be exercised by a majority of such fiduciaries, or by a majority of survivor fiduciaries, or by the survivor fiduciary. Such a power conferred upon or surviving to two such fiduciaries may be exercised jointly by both such fiduciaries or by the survivor fiduciary, unless contrary to the express terms of the instrument creating the power. A fiduciary who fails to act through absence or disability, or a dissenting fiduciary who joins in carrying out the decision of a majority of the fiduciaries if his or her dissent is expressed promptly in writing to his or her co-fiduciaries, shall not be liable for the consequences of any majority decision, provided that liability for failure to join in administering the estate or trust or to prevent a breach of the trust may not thus be avoided. A power vested in one or more persons under a trust of real property created in connection with the salvaging of mortgage participation certificates may be executed by one or more of such persons as provided in such trust.
This section shall not affect the right of any one of two or more personal representatives of a decedent to exercise a several power.
N.Y. EPTL 10-10.7