C.R.S. § 15-1.2-308

(1) A unitrust policy must provide the period used under sections 15-1.2-306 and 15-1.2-307 . Except as otherwise provided in section 15-1.2-309 (2)(c), the period may be: (a) A calendar year; (b) A twelve-month period other than a calendar year; (c) A calendar quarter; (d) A three-month period other than a calendar quarter; or (e) Another period. (2) Except as otherwise provided in section 15-1.2-309 (2), a unitrust policy may provide standards for: (a) Using fewer preceding periods under section 15-1.2-306 (1)(b)(II), (2)(c), or (2)(d) if: (I) The trust was not in existence in a preceding period; or (II) Market indices or other published data are not available for a preceding period; (b) Using fewer preceding periods under section 15-1.2-307 (2)(e)(I), (2)(e)(II), (2)(f)(II), or (2)(g)(II) if: (I) The trust was not in existence in a preceding period; or (II) Fair market values are not available for a preceding period; and (c) 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.