If a trustee determines that an allocation between principal and income required by section 31, 32, 33, 34, or 37 of this chapter is insubstantial, the trustee may allocate the entire amount to principal unless one (1) of the circumstances described in section 15(c) of this chapter applies to the allocation. This power may be exercised by a cotrustee in the circumstances described in section 15(d) of this chapter and may be released for the reasons and in the manner described in section 15(e) of this chapter. An allocation is presumed to be insubstantial if:
IC 30-2-14-30