Yes and Yes, Fuji, but if pilots don't (as is claimed) know about CAS then they are far less likely to know about this. To be honest I haven't got a clue what the procedures are, but the card is in my checklist (on the last page).
In fact I would bet that so few private pilots would know what to do, the police (when using their heli) must have some other procedure to communicate with the pilot.