Termination of tax treaty: either state may give diplomatic notice, causing the treaty to cease for subsequent fiscal years. Article 29 provides that the Agreement remains in force indefinitely but may be terminated by either Contracting State after five years from entry into force by written notice through diplomatic channels given on or before 30 June of any calendar year; termination takes effect in India for income arising in previous years beginning on or after 1 April next following the calendar year of notice, and in Czechoslovakia for income arising in years of income beginning on or after 1 January next following that calendar year.