Wine or made-wine shall be regarded as having been rendered sparkling if, as a result of aeration, fermentation or any other process, it either falls within paragraph 2(1) above or takes on such characteristics as are referred to in paragraph 2(3) above.

Wine or made-wine which has not previously been rendered sparkling by virtue of sub-paragraph (1) above shall be regarded as having been rendered sparkling if it is transferred into a closed container which has a mushroom-shaped stopper (whether solid or hollow) held in place by a tie or fastening.

Wine or made-wine which is in a closed container and has not previously been rendered sparkling by virtue of sub-paragraph (1) or (2) above shall be regarded as having been rendered sparkling if the stopper of its container is exchanged for a stopper of a kind mentioned in sub-paragraph (2) above.