In this chapter, the following terms have the meanings indicated. Terms Defined. “Child advocate” means an individual who works on behalf of children under Department of Juvenile Services' jurisdiction to see that their needs are met and their rights upheld through the operations of the agency. “Grievance” means a complaint due to a circumstance or action considered to be unjust. “Secretary” means the Secretary of Juvenile Services or the Secretary's designee. “Superintendent” means the chief administrative officer of an institution or a youth center.