The powers specified in subsection (4) are exercisable if—
The powers are exercisable only if the vehicle is—
But if the vehicle is in a garden or yard or other land occupied with and used for the purposes of a dwelling, the officer may exercise the powers under subsection (4) only if the officer has reasonable grounds for believing—
The officer may, so far as the officer thinks it necessary or expedient for the purpose of seizing the property under section 127C, require the person to—
An officer exercising a power under subsection (4) may detain the vehicle for so long as is necessary for its exercise.
A power conferred by this section may be exercised only with the appropriate approval under section 127G unless, in the circumstances, it is not practicable to obtain that approval before exercising the power.