Article 83

1. During a transitional period of seven years after the date of entry into force of this Agreement, an action for infringement or for revocation of a European patent or an action for infringement or for declaration of invalidity of a supplementary protection certificate issued for a product protected by a European patent may still be brought before national courts or other competent national authorities.


2. An action pending before a national court at the end of the transitional period shall not be affected by the expiry of this period.


3. Unless an action has already been brought before the Court, a proprietor of or an applicant for a European patent granted or applied for prior to the end of the transitional period under paragraph 1 and, where applicable, paragraph 5, as well as a holder of a supplementary protection certificate issued for a product protected by a European patent, shall have the possibility to opt out from the exclusive competence of the Court. To this end they shall notify their opt-out to the Registry by the latest one month before expiry of the transitional period. The opt-out shall take effect upon its entry into the register.


4. Unless an action has already been brought before a national court, proprietors of or applicants for European patents or holders of supplementary protection certificates issued for a product protected by a European patent who made use of the opt-out in accordance with paragraph 3 shall be entitled to withdraw their opt-out at any moment. In this event they shall notify the Registry accordingly. The withdrawal of the opt-out shall take effect upon its entry into the register.


5. Five years after the entry into force of this Agreement, the Administrative Committee shall carry out a broad consultation with the users of the patent system and a survey on the number of European patents and supplementary protection certificates issued for products protected by European patents with respect to which actions for infringement or for revocation or declaration of invalidity are still brought before the national courts pursuant to paragraph 1, the reasons for this and the implications thereof. On the basis of this consultation and an opinion of the Court, the Administrative Committee may decide to prolong the transitional period by up to seven years.