What it does
Mechanically, the Spent Convictions Act 1988 (WA) establishes two routes by which a conviction can become a "spent conviction" and, once spent, limits the legal and practical consequences of that conviction across Western Australian written laws. One route is judicial discretion for more serious sentences: a District Court judge may, on application, make an order declaring a serious conviction spent (s 6(1)). The other is an administrative certification by the Commissioner of Police for lesser sentences: the Commissioner must, if statutory conditions are met, issue a certificate that the lesser conviction is spent (s 7(1), (3)). The Act sets out definitions of serious and lesser convictions (ss 9-10), prescribes minimum waiting periods before applications may be made (s 11), and provides the substantive legal effects of a conviction becoming spent in Part 3 (notably ss 25-28). The Act binds the Crown (s 5) and applies to convictions incurred before commencement (s 32).
The long title states the policy purpose as rehabilitating people who have not reoffended during a specified period by limiting the effects of conviction, enabling reciprocity with other jurisdictions that have corresponding laws, and limiting the effects of dismissals or withdrawn charges. Those are claims of purpose in the statute itself and the Act implements them through the mechanisms described above: a time-based rehabilitation trigger (the prescribed period in s 11), an administrative route for lesser convictions (s 7), a judicial gate for serious convictions with articulated discretionary factors (s 6(4)), and express application to dismissals and withdrawn charges (s 12).
The legal effects are concrete. Part 3 provides that, except as expressly saved, a reference in a written law of the State to a conviction does not include a spent conviction (s 25(1)), persons assessing good character or fitness must not have regard to a spent conviction (s 26(1)), questions or contractual clauses that require disclosure of convictions do not require disclosure of spent convictions (s 27), and it is an offence to obtain information about a spent conviction from an official criminal record without lawful reason (s 28(1), penalty $1 000). Part 3 is given overriding operation "notwithstanding any other written law" (s 13), although the statute also contains layered and extensive exceptions (Division 2 and Schedule 3).