(1) This section applies to a person if—
(a) the person is the holder of a driver licence, other than a learner licence, probationary licence, provisional licence or restricted licence; and
(b) the person incurs 12 or more demerit points within the 3 year period ending on the day when the person last committed an offence for which demerit points have been recorded against the person.
(2) The road transport authority must serve a notice of licence suspension on the person under section 18.
(3) However, the road transport authority is not required to serve a notice of suspension on the person if the authority is of the opinion—
(a) that it would be unreasonable to do so, having regard to when any offence for which demerit points were incurred was committed; or
(b) that it would be more appropriate for a notice of licence ineligibility to be served on the person under section 20.