Which of the following is NOT one of the four TSA regulated security areas at an airport?

• A. Sterile Area
• B. AOA
• C. Secured Area/SIDA
• D. Terminal Concourse

Answer: (D)

TSA defines specific access-controlled zones in an airport to manage security and who can be where. The Sterile Area is the post-screening zone where passengers with boarding passes have access. The Air Operations Area (AOA) is the secure area outside the sterile zone where aircraft operations occur, and access is restricted. The Secured Area, also called SIDA, covers restricted spaces that require badge access for authorized personnel. The term Terminal Concourse isn’t a TSA-designated security area; a concourse is a building section within the terminal that may contain both secured and non-secured spaces, but it isn’t itself a named TSA security zone.