Article 22 Without the consent of the owner, others are prohibited from: Reproduction, usage or placing of a mark even with the addition of such words as "composition, style, system, imitation, type or method" as well as usage of a reproduced mark with respect to products or service similar to those indicated in the registration. Deletion or alteration of a mark which was legally placed. Article 23 In case there is a possibility of confusion to the public, it is prohibited without a license from the owner to: Reproduction, usage or placing a mark as well as usage of a reproduced mark on goods or services similar to those indicated in the registration. Counterfeit of a mark and using a counterfeit mark on goods or services identical or similar to those listed in the registration. Article 24 The user of a well-known mark with respect to goods or services which are not similar to those listed in the registration shall be held liable for civil responsibility if this results in damage to the owner of the mark or if this use represents an unjustifiable exploitation of this mark. The provisions of the first paragraph of the article shall apply to the use of well-known marks according to the international agreement ratified by the Republic of Tunisia. Article 25 The registration of mark does not prohibit the use of the same or similar sign: As a designation of a company, a commercial name, a shop name if this usage was done prior to the registration or if others used it as their surnames in good faith. As a necessary reference to indicate the way of usage of a product or a service specially as being a secondary piece or a spare part provided that there is no confusion as to the source of the product or service. However, if this usage will cause damage to the rights of the holder of the registration, the said holder may file a memorandum to the competent court requesting the prohibition or limiting of this usage. Chapter Four Transfer And Loss Of The Rights Associated With The Mark