actually not - his experience is an example of living in a state where said law does not apply - it isnt policed because it cant be not because the police cant be bothered.
The concept of standardized australian road law was an idea that never got to actual fruition, and no doubt the list of dumb laws you cite is testament to why that is the case
Oh then the law must have changed or you're looking for specific mention of a bicycle carrier (which there may not be).
I was booked in NSW for rear protrusion or words to that effect some years ago (1980s? in a
then brand new VN Commodore) with one of those beak carriers on the back. To the Policeman's credit he took the time to explain why it was illegal and the serious hazard it presented to a motorcyclist (the officer was on a motorbike). Actually there's more to the story because he had pulled me over earlier in the day and issued a warning. I promised that I'd remove the carrier but hadn't.....and we just happened to be on the same road at the end of his shift.
Please indulge me for a moment here on standardized road laws.....
Not that long ago, SA stopped issuing rego stickers. The idea was that your vehicle's registration status could be checked by computer access to the road transport database. Sounds reasonable because of the great cost savings to the SA community.
Problems arose whenever a SA registered vehicle crossed the border into Victoria. You see Victoria demanded that a rego sticker be displayed and there was no provision in the act for the SA situation. Drivers would produce a receipt to show that they had paid their registration however Vic police had no access to the SA database to check. This was a huge problem and for a period of time, SA plated vehicles seemed to be targeted for this infringement by the relevant authorities just East of the SA/Vic border.
If this were an episode of "Yes Minister" you'd dismiss it as being just too ridiculous and condem the writing team....