Article 9

1. Where, in a Member State, the proprietor of an earlier trade mark as referred to in Article 4(2) has acquiesced, for a period of five successive years, in the use of a later trade mark registered in that Member State while being aware of such use, he shall no longer be entitled on the basis of the earlier trade mark either to apply for a declaration that the later trade mark is invalid or to oppose the use of the later trade mark in respect of the goods or services for which the later trade mark has been used, unless registration of the later trade mark was applied for in bad faith.

2. Any Member State may provide that paragraph 1 shall apply mutatis mutandis to the proprietor of an earlier trade mark referred to in Article 4(4)(a) or an other earlier right referred to in Article 4(4)(b) or (c).

3. In the cases referred to in paragraphs 1 and 2, the proprietor of a later registered trade mark shall not be entitled to oppose the use of the earlier right, even though that right may no longer be invoked against the later trade mark.