(a) This chapter takes effect on January 1, 1983.
(b) Except as provided elsewhere in this chapter, on January 1, 1983:
(1) The chapter applies to any wills of decedents dying thereafter;
(2) An act of any personal representative or guardian done before January 1, 1983 in any proceeding and any accrued right is not impaired by this chapter. If a right is acquired, extinguished or barred upon the expiration of a prescribed period of time which has commenced to run by the provisions of any statute before January 1, 1983, the provisions shall remain in force with respect to that right; and
(3) Any rule of construction or presumption provided in this chapter applies to instruments executed before January 1, 1983 unless there is a clear indication of a contrary intent.