All cargo and mail shall be subjected to security controls prior to being loaded on an aircraft. An air carrier shall not accept cargo or mail for carriage on an aircraft unless it has applied such controls itself or their application has been confirmed and accounted for by a regulated agent, a known consignor F3....

Transfer cargo and transfer mail may be subjected to alternative security controls to be detailed in an implementing act.

Transit cargo and transit mail may be exempted from security controls if it remains on board the aircraft.

Cargo and mail to be carried on an aircraft shall be protected from unauthorised interference from the point at which security controls are applied until the departure of the aircraft on which it is to be carried.

Cargo and mail that are not adequately protected from unauthorised interference after security controls have been applied shall be screened.