With respect to wills of persons dying, or lifetime trusts established, after August 31, 1993, if there are more than two executors or trustees, donees of a power during minority, or donees of a power in trust, no more than two commissions shall be allowed unless the decedent or creator has specifically provided otherwise in a signed writing, and the compensation thus allowable must be apportioned among the fiduciaries or donees of the power in trust according to the services rendered by them respectively unless they shall have agreed in writing among themselves to a different apportionment which, however, shall not provide for more than one full commission for any one of them.
N.Y. Surr. Ct. Proc. Act Law § 2313