Allows a trustee of an irrevocable trust to appoint a successor trustee or multiple trustees. Provides that a trustee's power to appoint a successor trustee includes the power to allocate trustee powers to one or more trustees. Enacts the uniform trust decanting act. Creates a definition of the decanting power to include a power by a trustee to make limited modifications to an irrevocable trust, including an asset transfer to a new trust. Requires that a modification be consistent with a settlor's or charitable organization's intent. Permits the trustee of an existing trust to make modifications to or distributions from an existing trust for the benefit of a disabled beneficiary. Prohibits a trustee from being required to decant. Requires advanced notice to all qualified beneficiaries. Provides that the decanting power of an authorized fiduciary is not precluded by certain terms. (The introduced version of this bill was prepared by the Probate Code Commission.)