Where a sea installation becomes installed in the adjacent area in respect of Norfolk Island, of the Territory of Christmas Island or of the Territory of Cocos (Keeling) Islands, then, for the purpose only of any law in force in that Territory that relates to the importation of goods into that Territory or to the imposition of customs duties on goods that are so imported, the installation and goods on the installation at the time when the installation becomes so installed shall be deemed to have been imported into that Territory at the time when the installation becomes so installed.