What do these Customs messages 'MAF EXTERNAL', 'MAF WASH' or 'MAF FUMIGATE' mean, and how do I get a BACC?

These words indicate that your container requires one or more actions to be taken on the wharf. Once the action has been taken, MAF will issue a BACC allowing your container to move from the wharf. Contact your local MAF office with an Application for a BACC to confirm the transitional facility to which your container will go and the email address / fax number where they should send the BACC. You should have your Customs Client Reference number or ECI number on your application so MAF can look up your container.