Artikel 37

1. By a written notification addressed to the Secretary General of the Council of Europe, any State or the European Union may, at the time of signature or when depositing its instrument of ratification, acceptance or approval, declare that it avails itself of the reservations provided for in Article 19, paragraph 2 and in Article 36, paragraph 1. No other reservation may be made.
2. A Party that has made a reservation in accordance with paragraph 1 may wholly or partially withdraw it by means of a notification addressed to the Secretary General of the Council of Europe. Such withdrawal shall take effect on the date of receipt of such notification by the Secretary General. If the notification states that the withdrawal of a reservation is to take effect on a date specified therein, and such date is later than the date on which the notification is received by the Secretary General, the withdrawal shall take effect on that later date.
3. A Party that has made a reservation shall withdraw such reservation, in whole or in part, as soon as circumstances so permit.
4. The Secretary General of the Council of Europe may periodically ask Parties that have made one or more reservations for details about the prospects of withdrawal of such reservation(s).