56In those circumstances, the competent authority must, under Article 3(1)(c) of the Directive, determine whether a trade mark for which registration is sought currently represents, in the mind of the relevant class of persons, a description of the characteristics of the goods or services concerned or whether it is reasonable to assume that that might be the case in the future (see to that effect Windsurfing Chiemsee, paragraph 31). If, at the end of that assessment, the competent authority reaches the conclusion that that is the case, it must refuse, on the basis of that provision, to register the mark.