(1) If the countervailing duty imposed by the Central Government on the basis of the final findings of the investigation conducted by the designated authority is higher than the provisional duty already imposed and collected the differential shall not be collected from the importer.

(2) If the countervailing duty fixed after the conclusions of the investigation is lower than the provisional duty already imposed and collected, the differential shall be refunded to the importer.

(3) If the provisional duty imposed by the Central Government if withdrawn in accordance with the provisions of sub-rule (3) of rule 20, the provisional duty already imposed and collected, if any shall be refunded to the importer.