The remains of deceased persons can only be cremated in Western Australia if a permit has been issued by a medical referee. The application process for a permit to cremate is specified by law, and requires the use of the prescribed forms.
See Cremation approval process and prescribed forms for details.
Members of the public can get information about cremation facilities and services from the Metropolitan Cemeteries Board (external link).
An audit checklist for use by crematoria is available at Cremation audit checklist (PDF 938KB)
The legal steps to obtaining approval to cremate are specified in the Cremation Act 1929 and Cremation Regulations 1954.
You can view full documents on the State Law Publisher website (external link).