The board of trustees of Community College District No. 20 hereby establishes a rule on faculty tenure. The purpose of this tenure policy shall be to protect faculty employment rights and faculty involvement in the protection of those rights at Walla Walla Community College and subsequent community colleges hereafter established within Community College District No. 20. In order to insure the professional objectives of a community college staff, the board hereby adopts the following procedures as they exist now or as hereafter amended for administering faculty tenure.