The unicycle is defined in the Road Rules Dictionary as a:
'wheeled recreational device, built to transport a person, propelled by human power or gravity, and ordinarily used for recreation or play'.
The definition continues that a:
'wheeled recreational device (a) includes rollerblades, rollerskates, a skateboard, scooter, unicycle or similar wheeled device, but (b) does not include a golf buggy, pram, stroller or trolley, a motor-assisted device (whether or not the motor is operating), or a bicycle, wheelchair or wheeled toy.'
The definition is completely silent on the issue of helmets, as are the various regulations pertaining to 'wheeled recreational devices' within the NSW Road Rules 2008.
Notwithstanding my abhorrence for helmet laws, heaven forbid that the bicycle is ever included in that 'wheeled recreational device' definition - the provisions of regulations 240 - 244 (Road Rules 2008) would catergorically prohibit us from using certain roads!