The first purpose-built transport buses to deal with revellers at out-of-control parties have been unveiled.
The trucks, that are ready to be deployed now, can hold up to fourteen people at a time.
People detained can be transported to a police station for processing or held until someone is available to pick them up.
Police Commissioner Karl O’Callaghan said the trucks would act as a deterrent for partygoers as well as freeing up officers to deal with other issues.
Earlier this week, Mr O’Callaghan warned that party hosts could have to pay thousands of dollars in costs associated with police breaking up out-of-control parties if organisers could not show they took steps to ensure their gatherings were peaceful.
New laws passed State Parliament on Wednesday night and are expected to be proclaimed by Christmas, meaning WA Police will be able to enforce the legislation during the traditionally busy summer period.
Mr O’Callaghan said the laws would enable police to recover the costs of breaking up out-of-control parties if the hosts - including the parents of juveniles who organised the event - could not show they took steps to safeguard the gathering.
The Piara Waters riot - which attracted up to 500 youths in September - cost police about $16,000, including about $6000 for the police helicopter and high costs associated with specialist units, including canine and mounted sections, in addition to the officers’ wages.