Receipt of long term income protection benefits shall cease at the expiration of 24 months from the date of injury or illness causing such total disability unless the Employee has complied with Section 29.5 of this Article and has been determined to be returned to work, rehabilitated and/or retrained, or eligible for continuing total disability benefits because the Employee is disabled as defined in Section 29.5. Such determination shall occur upon medical verification by the Employee's treating physician and a physician appointed by the City that the determination is consistent with the Employee's medical condition. In event of disagreement, a third physician mutually agreed upon by the Employee and the City shall act as arbitrator. The arbitrator's decision as to whether the determination is consistent with the Employee's medical condition shall be binding on both parties.