Step 1: Understand the Vienna Convention.
The Vienna Convention on Diplomatic Relations, 1961, is an international treaty that codifies the rules for diplomatic relations between independent countries.
It specifies the privileges and immunities of diplomats.
Step 2: Know the need for domestic law.
For an international treaty to be enforceable in India's domestic courts, Parliament must pass a law to incorporate its provisions into the national legal system.
Step 3: Identify the year of the Indian Act.
India ratified the Vienna Convention in 1965.
To give its provisions the force of law within India, the Indian Parliament enacted the Diplomatic Relations (Vienna Convention) Act in the year 1972.