20 Pa.C.S. § 8142: Distribution from trust or estate.

A trustee shall allocate to income an amount received as a distribution of income from a trust or an estate in which the trust has an interest other than a purchased interest and shall allocate to principal an amount received as a distribution of principal from such a trust or estate. If a trustee purchases an interest in a trust that is an investment entity or a decedent or donor transfers an interest in such a trust to a trustee, section 8141 (relating to character of receipts) or 8155 (relating to asset-backed securities) applies to a receipt from the trust.