I may have my jurisdictions confused but my understanding is that you can retrieve the seized item( perhaps after the optioned trial date if you go that route). Phone the OPP station and make an inquiry. It's not illegal to own one it's illegal to use it, at least in ON.
A few years back we had a group of riders from the U.S. stay with us so I made a preemptory call to the local station and was told that if any of the U.S. riders had a warning device it had to be disabled ie. not connected to a power source that it best be stowed away.