4. Where texts both in French and in another language appear on separate signs or posters of a different size, the text in French is deemed to have a much greater visual impact if the following conditions are met:(1) the signs and posters bearing the text in French are at least as numerous as those bearing the text in the other language;
(2) the signs or posters bearing the text in French are at least twice as large as those bearing the text in the other language;
(3) the characters used in the text in French are at least twice as large as those used in the text in the other language; and
(4) the other characteristics of the signs or posters do not have the effect of reducing the visual impact of the text in French.