The selected text outlines new restrictions imposed by Transport Canada following two incidents involving incendiary devices at cargo hubs. These restrictions include:

Documentation Requirements: Shipments to or via Canada must include a specific message on the airwaybill or e-AWB, or be accompanied by a dated letter on company letterhead, confirming an established business relationship with the shipper.
Established Business Relationship: Defined as having an active account or documented payment history for at least 90 days prior to the issuance of the regulations, with a minimum of six shipments within that period.
Alternative Transport Options: Cargo-only aircraft, charters, or ocean freight can be used as alternatives.
These measures aim to enhance security and ensure compliance with Transport Canada’s regulations12.

Summary: Transport Canada has imposed new documentation and relationship requirements for air cargo to enhance security following recent incidents.