The Australian Citizenship Act 1948, Section 25 provided for the automatic acquisition of Australian citizenship by certain categories of people born before 26 January 1949 who were British subjects immediately prior to that date. The repeal of section 25 on 1 May 1987 did not affect the Australian citizenship status of people who acquired citizenship under these provisions.

Relevant categories of people are:

Passport applicants who automatically acquired Australian citizenship under the transitional provisions of the Australian Citizenship Act 1948 and who do not hold documentary evidence of citizenship, must apply to DIAC for a Certificate of Evidence of Australian Citizenship.