If a trustee determines that an allocation between principal and income required by Code Sections 53-12-425 through 53-12-428 or Code Section 53-12-431 is insubstantial, the trustee may allocate the entire amount to principal unless one of the circumstances described in Code Section 53-12-361 applies to the allocation. Such power may be exercised by a cotrustee in the circumstances described in Code Section 53-12-361 and may be released for the reasons and in the manner described in such Code section. An allocation shall be presumed to be insubstantial if:
OCGA § 53-12-424