Australian Capital Territory · Road Rules Knowledge Test practice question

According to ACT guidance, when is a child ready to move from a booster seat to an adult seatbelt?

When they are at least 145 cm tall and pass the 5-step test
As soon as they turn 7, regardless of their size
When they can see out of the side window
When they start primary school

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Correct answer: When they are at least 145 cm tall and pass the 5-step test

Age alone is not enough - the suggested minimum height for using an adult seatbelt is 145 cm, and the child should meet the 5-step test. A seatbelt that does not fit properly cannot protect a child in a crash.

Source: Access Canberra – Road Rules Handbook

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