Not sure on ya laws there , but here Melb, Ive had an A14 in my ute for 20yrs. Its been reg off and on for most of its life and up to 3 yrs ago when I last rego'd it , was never asked for engineers. Even now I presume if I re rego it they wouldnt ask me. So I presume your a15 had been rego'd before or was it put in after it was rego'd??