What does this Customs message "MAF INTERNAL" mean, and how do I get a BACC to move my container(s) from the wharf?

These words indicate that your container requires supervision of devanning by MAF. Contact your local MAF office with an Application for a BACC to confirm the transitional facility to which your container will go, and make an appointment for an officer to be present to supervise devanning. You should have your Customs Client Reference number or ECI number on your application so MAF can look up your container. MAF will prepare a BACC allowing your container to move to the transitional facility, where it must be held unopened until the MAF officer arrives.