If cameras are being used, recordings of footage covering key
import/export processes should be maintained on monitored shipments
for a sufficient time to allow an investigation to be completed.
If a breach were to happen, an investigation would need to be conducted, and maintaining any camera footage that covered the packing (for export) and loading/sealing processes would be of paramount importance in discovering where the supply chain may have been compromised.
For monitoring, the CTPAT program recommends allotting at least 14 days after a shipment has arrived at its first point of distribution. This is where the container is first opened after clearing Customs
So they recommend a minimum of 14 days of video storage per camera. Other programs (i.e. TAPA) have a 30 day requirement.