<P>Appropriate safeguards should be available for all rightholders, who should be given the opportunity of excluding the application of the licensing mechanisms and of the exception or limitation, introduced by this Directive for the use of out-of-commerce works or other subject matter, in relation to all their works or other subject matter, in relation to all licences or all uses under the exception or limitation, in relation to particular works or other subject matter, or in relation to particular licences or uses under the exception or limitation, at any time before or during the term of the licence or before or during the use under the exception or limitation. Conditions governing those licensing mechanisms should not affect their practical relevance for cultural heritage institutions. It is important that, where a rightholder excludes the application of such mechanisms or of such exception or limitation to one or more works or other subject matter, any ongoing uses are terminated within a reasonable period, and, where they take place under a collective licence, that the collective management organisation once informed ceases to issue licences covering the uses concerned. Such exclusion by rightholders should not affect their claims to remuneration for the actual use of the work or other subject matter under the licence.</P>