i think the flare should be removed for sva because it can come out whilst you are driving/in emergency.
Maybe it is like most things, once sva completed, everything put back on the car (naughty).
I once had a car fail sva because the radio had a button that protruded from the dash by 0.0001 (exageration) of a millimetre.
strike it up, hours of endless fun!?
scary bit is trying to put the bugger back out again.