Adoption of Children Act Amendment Act 1945, 30 January 1946, courtesy of State Law Publisher of Western Australia.
The Adoption of Children Act Amendment Act 1945 extended the secrecy about original birth records to all children adopted in WA (regardless where in Australia they had been born) and to all WA-born people who had been adopted (regardless where in Australia the adoption order was granted).
SLPWA: No. 31 of 1945 (9 and 10 Geo. V., No. XXXI)