(a) A unitrust policy must provide the period used under Kan. Stat. Ann. 2023 Supp. 58-9a-306 and 58-9a-307, and amendments thereto. Except as otherwise provided in Kan. Stat. Ann. 2023 Supp. 58-9a-309(b)(3), and amendments thereto, the period may be:

(1) A calendar year;

(2) a 12-month period other than a calendar year;

(3) a calendar quarter;

(4) a three-month period other than a calendar quarter; or

(5) another period.

(b) Except as otherwise provided in Kan. Stat. Ann. 2023 Supp. 58-9a-309(b), and amendments thereto, a unitrust policy may provide standards for:

(1) Using fewer preceding periods under Kan. Stat. Ann. 2023 Supp. 58-9a-306(a)(2)(B), (b)(3) or (b)(4), and amendments thereto, if:

(A) The trust was not in existence in a preceding period; or

(B) market indices or other published data are not available for a preceding period;

(2) using fewer preceding periods under Kan. Stat. Ann. 2023 Supp. 58-9a-307(b)(5)(A) or (B), (6)(B) or (7)(B), and amendments thereto, if:

(A) The trust was not in existence in a preceding period; or

(B) fair market values are not available for a preceding period; and

(3) prorating the unitrust amount on a daily basis for a part of a period in which the trust or the administration of the trust as a unitrust or the interest of any beneficiary commences or terminates.