doesnt change anything..
so if you get impounded go to court and win, as in no charges laid in relation to 'hooning' how can you not be refunded for the impound? Legally you must be as the police acted outside the law in impounding you in the first place?
edit apparently any costs you have incurred get refunded if found not guilty.
http://www.legalaid.vic.gov.au/cl.road_to_court.pdf