If a leave of absence or other reason will prevent a senator or alternate from performing the duties of the office for a period of one academic year or longer, the position will be declared vacant and a new election will be held to fill the remainder of the unexpired term. An individual currently serving as an alternate may run in the election for a senate seat which has been vacated in this manner. In the event that both the senator and the alternate are simultaneously unable to represent the campus for a period in excess of four months during the academic year, both offices will be declared vacant and the unexpired terms will be filled by a new election.