New laws that aim to break up bikie gangs will likely be challenged by the outlaws in court, WA Attorney-General Michael Mischin has flagged.
The Criminal Organisation Control Bill was passed through the Parliament in November last year and will come into effect on Saturday.
Under the laws, police can apply to the courts for bikie gangs and other underworld associations to be declared criminal organisations.
Members could then face control orders to stop them associating with other such people, ban them from certain locations such as clubhouses, and prevent them from promoting the organisation or transferring funds to it.
Penalties range from two years in jail for a first offence to 20 years imprisonment for instructing an offence for the benefit of a criminal organisation.
Mr Mischin said the first application would be "thoroughly" compiled to ensure it was successful.
"We don't want the first one to be litigated to the point where it falls over," police deputy commissioner Chris Dawson said today.
Mr Mischin said similar legislation had been tested in other Australian jurisdictions.
"Those (challenges) have been dealt with and the High Court has been critical of some aspects of those," he said.
"We've learnt from those experiences."
While Queensland had taken a more extreme approach, he was confident any challenges to the WA law on the grounds it was unconstitutional would fail.
"I see nothing unconstitutional about these laws."
And it was ironic that bikies, who pride themselves on being the "one percenters" living outside the law would "suddenly become great civil libertarians when one interferes with their ability to commit crimes".
"I'm not impressed with that argument. If they want to challenge, there are legal processes that are available for that.
"We'll deal with the problem when it arises."(The law) is sound and if it needs a fix, we'll fix it."