New South Wales Consolidated Acts New South Wales Consolidated Acts(cf Police Powers (Vehicles) Act 1998 , s 12)
(1) A senior police officer who gives a roadblock authorisation must--(a) if the authorisation is in writing--specify the following--(i) the date on, and time at, which the authorisation is given,(ii) the vehicle roadblock powers conferred by the authorisation and the indictable offence or risk to public safety in respect of which the authorisation is given,(iii) the road, road related area or other public place or school in respect of which the authorisation is given,(iv) the vehicle (or class of vehicles) in respect of which the authorisation is given,(v) the period of the authorisation if the period is less than 6 hours, or(b) if the authorisation is given verbally--make a record as soon as is reasonably practicable after the giving of the authorisation of the matters referred to in paragraph (a).
(2) A failure to comply with subsection (1) does not invalidate a roadblock authorisation.