If a trustee determines that an allocation between principal and income required by s. 701.1120(2), 701.1123, 701.1124, 701.1125, 701.1126, or 701.1129 is insubstantial, the trustee may allocate the entire amount to principal unless one of the circumstances described in s. 701.1104(3) applies to the allocation. This power may be exercised by a cotrustee in the circumstances described in s. 701.1104(4) and may be released for the reasons and in the manner described in s. 701.1104(5). An allocation is presumed to be insubstantial if:
Wis. Stat. § 701.1122