Article 27

For the purposes of this Directive, the following definitions apply:
(a) ‘guarantee or certification mark’ means a trade mark which is described as such when the mark is applied for and is capable of distinguishing goods or services which are certified by the proprietor of the mark in respect of material, mode of manufacture of goods or performance of services, quality, accuracy or other characteristics, from goods and services which are not so certified;
(b) ‘collective mark’ means a trade mark which is described as such when the mark is applied for and is capable of distinguishing the goods or services of the members of an association which is the proprietor of the mark from the goods or services of other undertakings.