I. – A trade mark shall not entitle its proprietor to prohibit a third party from using, in the course of trade, in accordance with honest practices in the trade:
1° Of his surname or address where that third party is a natural person;
2° Of signs or indications which are devoid of any distinctive character or which relate to the kind, quality, quantity, intended purpose, value, geographical origin, the time of production of the goods or of rendering of the service or to other characteristics thereof;
3° Of the trade mark to designate or mention goods or services as being those of the proprietor of that trade mark, in particular where such use is necessary to indicate the intended purpose of a product or service, in particular as an accessory or spare part.
II. – A trade mark shall not entitle its proprietor to prohibit a third party from using, in the course of trade, a local trade name, sign or domain name, where such use predates the date of the application for registration of the trade mark and is exercised within the limits of the territory where they are recognised.