Article 17U.K.
For the purposes of this Directive, participating interest shall mean rights in the capital of other undertakings, whether or not represented by certificates, which, by creating a durable link with those undertakings, are intended to contribute to the company's activities. The holding of part of the capital of another company shall be presumed to constitute a participating interest where it exceeds a percentage fixed by the Member States which may not exceed 20 %.