(a) General rule.--If a Federal estate or gift tax marital deduction is allowed for all or part of a trust whose income is required to be paid to the settlor's or testator's spouse and whose assets consist substantially of property that does not provide the spouse with sufficient income from or use of the trust assets, and if the amounts that the trustee transfers from principal to income under section 8104 (relating to trustee's power to adjust) and that the trustee distributes to the spouse from principal pursuant to the governing instrument are insufficient to provide the spouse with the beneficial enjoyment required to obtain the marital deduction, the spouse may require the trustee to make property productive of income, convert property within a reasonable time or exercise the power conferred by section 8104(a). The trustee may decide which action or combination of actions to take.
(b) Other cases.--In cases not governed by subsection (a), proceeds from the sale or other disposition of an asset are principal without regard to the amount of income the asset produces during any accounting period.
Cross References. Section 8153 is referred to in section 8144 of this title.