No disciplinary proceedings under this Measure shall be instituted unless the misconduct in question, or the last instance of it in the case of a series of acts or omissions, occurred within the period of one year ending with the date on which proceedings are instituted:
Provided that, when the misconduct is one for which the person concerned has been convicted either on indictment or summarily, proceedings may be instituted within twelve months of the conviction becoming conclusive, notwithstanding that the aforesaid period of one year has elapsed:
And provided further that the president of tribunals may, if he considers that there was good reason why the complainant did not institute proceedings at an earlier date, after consultation with the complainant and the respondent, give his written permission for the proceedings to be instituted after the expiry of the said period of one year.