Commonwealth Numbered Regulations

1988 NO. 158 CIVIL AVIATION REGULATIONS - REG 190

190. For the purpose of warning an aircraft that it is in the vicinity of a
danger area, a prohibited area or a restricted area and should take remedial
action, the signal used shall be, by day or by night, a series of projectiles,
discharged at intervals of 10 seconds each, showing, on bursting, red and
green lights or stars.