Two SA bikie gangs shut shop after new law

Bikie gangs are shutting up shop in South Australia as new laws declaring them criminal organisations come into force.

Ten gangs have been outlawed - the Bandidos, Comancheros, Descendants, Finks, Gypsy Jokers, Hells Angels, Mongols, Nomads, Rebels and Red Devils - and Attorney-General John Rau says the public should see an immediate reduction in their activities.

They will be prevented from engaging in organised rides, displaying gang colours or gathering in groups of more than two.

Police Commissioner Grant Stevens says two bikie clubrooms in Adelaide operated by the Comancheros and the Rebels have already been vacated in response to the new laws and others are in the process of shutting down.

"This is a significant step forward in our ability to dismantle and disrupt organised crime groups, the public face of that organised crime cohort being outlaw motorcycle gangs," Mr Stevens said on Thursday.

"I fully expect there will be a greater sense of public safety as a result of these laws because we are preventing these people from exercising a level of coercion and intimidation."

Mr Rau said the new laws highlighted the government's commitment to cracking down on organised crime.

He said he would not be surprised if the new laws faced a legal challenge but was confident they would withstand any scrutiny.

South Australia's previous attempt to outlaw bikie gangs was found to be invalid by the High Court.