Sec. 2. (a) All files and records pertaining to the adoption proceedings in:
(1) the local office;
(2) the department; or
(3) any of the licensed child placing agencies;
are confidential and open to inspection only as provided in IC 31-19-13-2(2), IC 31-19-17, this chapter, or IC 31-19-20 through IC 31-19-25.5.
(b) The files and records described in subsection (a), including investigation records under IC 31-19-8-5 (or IC 31-3-1-4 before its repeal):
(1) are open to the inspection of the court hearing the petition for adoption; and
(2) on order of the court, may be:
(A) introduced into evidence; and
(B) made a part of the record;
in the adoption proceeding.