Wis. Admin. Code UWS § 10.01
Academic staff appointments may be fixed term, probationary, or indefinite. Several probationary academic staff appointments may precede the granting of an indefinite appointment. Each institution shall develop guidelines concerning the categories of academic staff positions that may be appropriately designated as fixed term, probationary, or indefinite appointments. Appointments may be made in the central administration, an institution, college, department (or its functional equivalent), or a specified research or program unit. An appointment shall be limited to an operational area specified at the time of the appointment and shall not carry rights beyond that limitation.
Wis. Admin. Code Board of Regents of the University of Wisconsin System § UWS 10.01