2.01.The board of directors may, if it so considers necessary for the protection of the public, oblige a dentist to serve a training period, particularly in one or more of the following circumstances:
(a) if a dentist is entered on the roll more than 5 years since he obtained his diploma or more than 5 years from the date on which he was entitled to the issuance of a permit;
(b) if a dentist is re-entered on the roll after failing to be entered thereon for more than 5 years;
(c) if a dentist is re-entered on the roll after being struck off for more than 5 years;
(d) if a dentist is the subject of a recommendation to that effect by the professional inspection committee or the disciplinary council pursuant to section 113 or 160 of the Professional Code (chapter C-26);
(e) if a trainee has served a training period not considered to conform with the objectives, terms and conditions determined by the board of directors;
(f) if a dentist, although entered on the roll of the Order, has ceased active practice of dental surgery for more than 5 years.