DTAA incorporation: notification requirement under domestic law limits automatic treaty application across countries and clarifies temporal scope.

The decision holds that a DTAA requires a mandatory notification under Section 90(1) to be effective domestically, that provisions in a DTAA with one country do not automatically extend to other bilateral agreements without explicit amendment, and that the present-tense term "is" fixes the temporal application of treaty benefits to the date of treaty entry with India.

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