to answer a previous question.. engineer's certificate in SA wont get you past a cop. similar to interstate, you can still get defected, the engineer certificate will just get you past the inspection afterwards.
HOWEVER,
due to the current ****ed up situation at Regency, they will ignore the engineer's certificate either way - which legally they're not supposed to do as they are not qualified engineers.
also height-adjustable coilover suspension is NOT defectable. Regency wont let you through with them 90% of the time because they're ****s.