@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.
first named insured The person or entity listed first on the policy declarations page as an insured. This primary or first named insured is granted certain rights and responsibilities that do not apply to the policy's other named insureds. Examples of additional rights of first named insureds are the receipt of cancellation notice and return premiums.