The way parliamentary procedure used to carry on is this...
After a motion is passed, there still have to be two readings before upper house ratifies a law.
Until it's law all engineering certificates would remain valid.
And from our end, until the 2nd reading people would need to muster support to place a decent set of objections I think.
Objections might include loss of income, loss of job etc
The support base would need to include a cohesive unit of CAMs, car clubs, Repco, Auto Barn, Auto One, Bob Jane and other Wheel Shops, Bilstein and other Suspension Shops, Better Brakes and other Brake Shops, MTA, Just Car, Lumleys SV, Shannon's & maybe even the NRMA.
The government has to make sure not to hurt people and their families with overkill. Can you imagine how many millions of dollars are spent by enthusiasts each year to support the above industries?
Now how do all the above groups and businesses become mobilised?
Car clubs will do a great service to the government and public perception if we can convince all road users that we teach good useful skills to our members!