Sec. 2. A determination of paternity or related order that:
(1) was issued before May 1, 1989;
(2) was issued five (5) or more months after the father's death; and
(3) resulted from a civil proceeding for the establishment of paternity that was filed in accordance with IC 31-6-6.1-6 (before its repeal, now codified at IC 31-14-5 and IC 31-14-11):
(A) during the father's lifetime; or
(B) within five (5) months after the father's death;
is legalized and validated to the same extent as if the determination of paternity or related order had been issued during the father's lifetime or within five (5) months after the father's death.