Neb. Rev. Stat. § 30-4045

Except as otherwise provided in the Nebraska Uniform Power of Attorney Act, on January 1, 2013: (1) The act applies to a power of attorney created before, on, or after January 1, 2013; (2) The act applies to a judicial proceeding concerning a power of attorney commenced on or after January 1, 2013; (3) The act applies to a judicial proceeding concerning a power of attorney commenced before January 1, 2013, unless the court finds that application of a provision of the act would substantially interfere with the effective conduct of the judicial proceeding or prejudice the rights of a party, in which case that provision does not apply and the superseded law applies; and (4) An act done before January 1, 2013, is not affected by the act.