C-11, r. 9 - Regulation respecting the language of commerce and business

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15. A firm’s commercial advertising, displayed on billboards, on signs or posters or on any other medium having an area of 16 m2 or more and visible from any public highway within the meaning of section 4 of the Highway Safety Code (chapter C-24.2), must be exclusively in French unless the advertising is displayed on the very premises of an establishment of the firm.
O.C. 1756-93, s. 15.