New South Wales Consolidated Acts(cf Traffic Act, s 4E (2A), (2B), (6) and (8))
(1) A police officer may require a person to undergo a breath test in accordance with the officer’s directions if the officer has reasonable cause to believe that the person:(a) is or was driving a motor vehicle on a road or road related area, or(b) is or was occupying the driving seat of a motor vehicle on a road or road related area and attempting to put the motor vehicle in motion, or(c) being the holder of a driver licence, is or was occupying the seat in a motor vehicle next to a holder of a learner licence while the holder of the learner licence is or was driving the vehicle on a road or road related area.
(2) A person must not, when required by a police officer to undergo a breath test under subsection (1), refuse or fail to undergo the breath test in accordance with the directions of the officer.Maximum penalty: 10 penalty units.
(3) It is a defence to a prosecution for an offence under subsection (2) if the defendant satisfies the court that the defendant was unable on medical grounds, at the time the defendant was required to do so, to undergo a breath test.
(3A) Before requiring a person to undergo a breath test under subsection (1), and for the purpose of determining whether to conduct such a test, a police officer may conduct a preliminary assessment to determine if alcohol is present in the person’s breath by requiring the person to talk into a device that indicates the presence of alcohol.
(4) Without limiting any other power or authority, a police officer may, for the purposes of this section, request or signal the driver of a motor vehicle to stop the vehicle.
(5) A person must comply with any request or signal made or given to the person by a police officer under subsection (4).Maximum penalty: 10 penalty units.