Commencement: determining when an Act commences?


To find out when an Act commences, check the commencement provisions (usually section 2). The complete Act can commence at the same time, or parts may commence at different times.

The most common commencement provisions are:

  • On a day (or days) to be fixed by proclamation (commonly referred to as “proclaimed”). Proclamations are published in the Government Gazette;
  • On the date of Royal Assent (i.e. signing by the Governor);
  • On a specified date.

If an Act does not have any reference to commencement provisions it is deemed to be operative 28 days after receiving Royal Assent.

Assent and commencement information for all Western Australian Acts can be found on our web site under "Legislation Information". Clients can download a PDF or Word file.


Government of Western Australia
Department of the Premier and Cabinet. State Law Publisher.
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