Tax treaty termination requires prior diplomatic notice and specifies differing effective dates for India and Tanzania. Termination of the Double Taxation Agreement is permitted by either Contracting State through diplomatic channels by giving at least six months' notice before the end of a calendar year after the Agreement has been in force for five years; the notice governs when the Agreement ceases to apply. The Agreement ceases in India for income derived in any year of income on or after the first day of April following the calendar year in which notice is given, and in Tanzania for income derived in any year of income on or after the first day of January following that calendar year.