1. The effective date of disability retirement for a member whose application for disability retirement has been approved by the Board is:
(a) The day after the member’s last day of employment; or
(b) The day after the member’s death, if death intervenes between the member’s application and the member’s retirement.
2. A member whose application for disability retirement has been approved by the Board must retire from the member’s employment and begin drawing benefits within 60 days after the date of the approval or the member must reapply and be reapproved before the member may draw benefits unless the member remains on sick leave for the entire period of continued employment.