(1) A relevant decision-maker may, by written notice to a permit holder, cancel the permit of a permit holder if the relevant decision-maker is satisfied that there are grounds for the cancellation of the permit.(2) A notice under subsection (1) must specify (a) the grounds for the cancellation; and(b) the date or time from which the cancellation takes effect.(3) A notice under subsection (1) may be given orally in an emergency.(4) If notice is given orally under subsection (3) , the relevant decision-maker is to give the permit holder written confirmation of the cancellation as soon as practicable.