Artikel 16

This Agreement shall remain in force for a period of two years from the date of its entry into force in accordance with paragraph 2 of Article 13. Thereafter it shall remain in force from year to year for such Contracting Parties as have not denounced it by a notification to that effect addressed to the Secretary-General of the Council of Europe at least six months before the expiry either of the preliminary two-year period, or of any subsequent yearly period. Such notification shall take effect at the end of the period to which it relates.