This chapter applies, to any will and trust established under an instrument executed on or after the effective date of this chapter except as otherwise expressly provided in the will or terms of the trust or in this chapter, or if the trustee or personal representative elects in either's sole discretion to administer the trust or will under this chapter.
With respect to any will or trust established under an instrument executed prior to the effective date of this chapter, this chapter applies if the trustee or personal representative elects, in either's sole discretion, to administer the trust or will under this chapter.