Vienna 1989 53 opportunities for their citizens to acquaint themselves directly with the creative work in and from other participating States. (52) They will ensure the unimpeded circulation of works of art and other cultural objects, subject only to those restrictions which are aimed at preserving their cultural heritage, are based on respect for intellectual and artistic property rights or derive from their international commitments on the circulation of cultural property. (53) They will encourage co-operation between and joint artistic endeavours of persons from different participating States who are engaged in cultural activities; as appropriate, facilitate specific initiatives to this end by such persons, institutions and organizations and encourage the participation of young people in such initiatives. In this context they will encourage meetings and symposia, exhibitions, festivals and tours by ensembles or companies, and research and training programmes in which persons from the other participating States may also freely take part and make their contribution. (54) The replacement of persons or groups invited to participate in a cultural activity win be exceptional and subject to prior agreement by the inviting party. (55) They will encourage the holding of film weeks including, as appropriate, meetings of artists and experts as well as lectures on cinematographic art; facilitate and encourage direct contacts between film directors and producers with a view to co-producing films; and encourage co-operation in the protection of film material and the exchange of technical information and publications about the cinema. (56) They will explore the scope for computerizing bibliographies and catalogues of cultural works and productions in a standard form and disseminating them. (57) They will encourage museums and art galleries to develop direct contacts, inter alia with a view to organizing exhibitions, including loans of works of art, and exchanging catalogues. (58) They will renew their efforts to give effect to the provisions of the Final Act and the Madrid Concluding Document relating to less widely spoken languages. They will also encourage initiatives aimed at increasing the number of translations of literature from and into these languages and improving their quality, in particular by the holding of workshops involving translators, authors and publishers, by the publication of dictionaries and, where appropriate, by the exchange of translators through scholarships. (59) They will ensure that persons belonging to national minorities or regional cultures on their territories can maintain and develop their own culture in all its aspects, including language, literature and religion; and that they can preserve their cultural and historical monuments and objects. (…) (61) Taking duly into account the originality and diversity of their respective cultures, they will encourage efforts to explore common features and to foster greater awareness of their