From 1 February 2017, children under the age of 8 are prohibited from being carried as passengers on quad bikes and utility off-road vehicles, as well as any child of any age if they are unable to sit with their feet flat on the floor and hands on handholds.
Additionally, as of 1 February 2017 the requirement for the operator of a quad bike or utility off-road vehicle and their passengers to wear a motorcycle helmet will be legislated in the Transport Operations (Road Use Management—Road Rules) Regulation 2009. Failing to comply with the mandatory helmet requirements will result in a fine of $365 and the incursion of 3 demerit points. This offence will also be subject to existing motorcycle helmet double demerit point penalties. If 2 or more motorcycle helmet offences are committed within a 12 month period, the second and subsequent offences will incur double demerit points.
From 1 February there will still be no exemptions from wearing an approved motorcycle helmet for quad bike riders and passengers. Exemptions from wearing an approved motorcycle helmet still apply for the driver and passengers of utility off-road vehicles being operated under condition code LO3, provided the vehicle has factory fitted seatbelts and a roll over protection system
For more information take the time to read the documentations listed on the QLD Government’s Website, Link below
https://www.qld.gov.au/transport/registration/register/conditional/about-conditional/index.html