Entry into force of tax treaty requires mutual notification and delayed activation, and terminates the prior treaty.

The Convention enters into force thirty days after receipt of the later written notification by the Contracting States that domestic procedures are complete; it applies in India for fiscal years beginning on or after the first April following the calendar year of entry into force, and in Hungary for fiscal years beginning on or after the first January following that calendar year; the 1986 Convention and Protocol cease to have effect once the new Convention becomes effective under these rules.

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