@Jack, In a routed transaction, both must occur. The FPPI must facilitate the export and then authorize the USPPI or a U.S. agent to file the EEI. If the FPPI has not authorized a filer, however, that does not mean it is not a routed transaction.
It is just a proof of insurance. Additional Insured: The main contractor is named as an additional insured on the certificate of insurance and is actually given coverage, and has rights under the sub-contractors or vendor's, the Named Insured policy in the event of a future claim.
Similarly, know what you are demanding when your business asks for that status from another business on their business insurance policy. The cost of adding an additional insured to a property or liability insurance policy is generally low, as compared to the costs of the original premium. Businesses work with other businesses on a daily basis to complete joint projects.