| (1) | The seniority of a member, including an officer on whom a temporary commissioned rank is conferred under section 54(4) of the Act, in any substantive or temporary rank is, in relation to other members of the same or equivalent substantive or temporary rank, determined by the date of his or her appointment or reappointment in or promotion to that substantive or temporary rank: Provided that a member holding a substantive rank is senior to all members holding temporary ranks of the same or equivalent grade. |