International law in general — Relation to municipal law — Treaty and municipal legislation — Whether municipal legislation capable of being questioned on ground of inconsistency with treaty — Whether former Indian ruler could assert immunity granted by merger agreement with Union of India in Indian Court — The law of India

Treaties — Conclusion and operation of treaties — Effect of municipal legislation — Merger of States — Merger agreement guaranteeing the personal rights and privileges of the former ruler — Ruler immune before merger from liability to taxation in respect of his private property — Successor imposing tax liability by legislation — Whether legislation liable to challenge — Whether claim of immunity based on merger agreement justiciable — The law of India