Pending approval faculty members are allowed to take leaves of absence from the university to undertake activities related to professional development and for medical reasons (see Section IV). Sabbatical leave is not available to probationary or temporary faculty. However, time on other types of leave may affect the tenure clock. According to the Constitution and Bylaws, Article 6.19, time on total or partial leave does not count toward tenure unless it is agreed before the leave begins that it will count. In the case of FMLA leave, a faculty member may request an extension of the tenure probationary period for a period of one year, as set forth in the APPM, Section 11, Item 31. In all cases, variations and changes in the tenure clock require approval from the department, the college dean, and the provost.