Temporary Employee Employees may be hired for a specific term not to exceed six (6) months, to replace an employee who will be on approved leave of absence, absence due to WSIB disability, sick leave, long term disability or to perform a special non-recurring task. This term may be extended a further six (6) months on mutual agreement of the Union, employee and Hospital or by the Hospital on its own up to twelve (12) months where the leave of the person being replaced extends that far. The period of employment of such persons will not exceed the absentee's leave. The release or discharge of such persons shall not be the subject of a grievance or arbitration. This clause would not preclude such employees from using the job posting provision under the collective agreement and any successful applicant who has completed his probation period will be credited with the appropriate seniority. The Hospital will outline to employees selected to fill such temporary vacancies and the Union, the circumstances giving rise to the vacancy, and the special conditions relating to such employment.