(a)(1) If a marital deduction is allowed for all or part of a trust 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 § 15-502.2(a) of this subtitle and distributes to the spouse from principal in accordance with the terms of the trust 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 may request the trustee exercise the power conferred by § 15-502.2(a) of this subtitle.