“Administrator” means the Administrator of the property tax assessment appeal boards. “Appraisal” means a formal, narrative, written appraisal report submitted as evidence to a property tax assessment appeal board as documentation of a value estimate. “Board” means a property tax assessment appeal board for a county. “County” includes Baltimore City. “Department” means the Department of Assessments and Taxation. “Supervisor” means the supervisor of assessments for a county.