Import restriction on Areca nut permitted only for actual users or where SIONs explicitly authorize its use. Importation of Areca nut (i.e. Betel nut) as an input is permitted only when it is specifically listed in the SION for the export product, or when imported by an actual user whose SION either names the input or whose product's SION includes a generic description that reasonably covers Areca nut.