If some or all of our workers do not work within the specific list of Port offices identified by the Port or have only a fleeting presence at a location, do we have to provide attestation forms?

If none of your employees work within any of the Port offices or the ones that do have only a fleeting presence at a location therein, then the Port contractor does not need to provide attestation forms to the Port.  However, if any of your employees work within any of the Port offices or have more than a fleeting presence therein, then the Port contractor does need to provide attestation forms to the Port.