For graduated driver’s licence (GDL) drivers, when do their driver’s licence privileges get suspended?

• If you have accumulated eight or more demerit points within a two-year period.
  Explanation:

  "If you have accumulated eight or more demerit points within a two-year period, your driver’s licence privileges will be automatically suspended for a period of time."
• If you have accumulated nine or more demerit points within a two-year period.
• If you have accumulated eight or more demerit points within a three-year period.
• If you have accumulated nine or more demerit points within a three-year period.