64With regard more particularly to the questions concerning nationality clauses, it appears that the relevant heads of claim have been held admissible in the main proceedings on the basis of a national procedural provision permitting an action to be brought, albeit for declaratory purposes only, to prevent the infringement of a right which is seriously threatened. As is clear from its judgment, the national court considered that application of the nationality clauses could indeed impede Mr Bosman's career by reducing his chances of being employed or fielded in a match by a club from another Member State. It concluded that Mr Bosnian's claims for a declaration that those nationality clauses were not applicable to him met the conditions laid down by the said provision.
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