49 CFR §1546.213

1. (a)Before a foreign air carrier authorizes and before an individual performs a function described in paragraph (b) of this section—
   1. (1)Each individual must successfully complete a security threat assessment or comparable security threat assessment described in part 1540 subpart C of this chapter; and
   2. (2)Each aircraft operator must complete the requirements in part 1540 subpart C.
2. (b)The security threat assessment required in paragraph (a) of this section applies to the following:
   1. (1)Each individual who has unescorted access to cargo and access to information that such cargo will be transported on a passenger aircraft; or who has unescorted access to cargo that has been screened for transport on a passenger aircraft; or who performs certain functions related to the transportation, dispatch or security of cargo for transport on a passenger aircraft or all-cargo aircraft, as specified in the foreign air craft operator's or foreign air carrier's security program; from the time—
      1. (i)The cargo reaches a location where a foreign air carrier operating under § 1546.101(e) consolidates or inspects it pursuant to security program requirements, until the cargo enters an airport Security Identification Display Area or is transferred to another TSA-regulated aircraft operator, foreign air carrier, or indirect air carrier; or
      2. (ii)A foreign air carrier under §§ 1546.101(a) or (b) accepts the cargo, until the cargo—
         1. (A)Enters an airport Security Identification Display Area;
         2. (B)Is removed from the destination airport; or
         3. (C)Is transferred to another TSA-regulated aircraft operator, foreign air carrier, or indirect air carrier.
   2. (2)Each individual the foreign air carrier authorizes to screen cargo or to supervise the screening of cargo under § 1546.205.