49 CFR § 1542.205 - Security of the security identification display area (SIDA).
(1) Each secured area must be a SIDA.
(2) Each part of the air operations area that is regularly used to load cargo on, or unload cargo from, an aircraft that is operated under a full program or a full all-cargo program as provided in § 1544.101(a) or (h) of this chapter, or a foreign air carrier under a security program as provided in § 1546.101(a), (b), or (e), must be a SIDA.
(3) Each area on an airport where cargo is present after an aircraft operator operating under a full program or a full all-cargo program under § 1544.101(a) or (h) of this chapter, or a foreign air carrier operating under a security program under § 1546.101(a), (b), or (e) of this chapter, or an indirect air carrier, accepts it must be a SIDA. This includes areas such as: Cargo facilities; loading and unloading vehicle docks; and areas where an aircraft operator, foreign air carrier, or indirect air carrier sorts, stores, stages, consolidates, processes, screens, or transfers cargo.
(4) Other areas of the airport may be SIDAs.
(1) Establish and carry out a personnel identification system described under § 1542.211.