The provisions of Concurrent List, freedom of trade, commerce and intercourse and joint sitting of two Houses of Parliament are borrowed from :

Australian Constitution: Principle of co-operative federalism, Freedom of inter-state trade, commerce and intercourse, Idea of concurrent list. UK Constitution: Law making procedures, Parliamentary Government, Rule of Law, Single citizenship, Cabinet system. US Constitution: Fundamental Rights, Independent judiciary, Judicial review, Procedure for the removal of the judges of the Supreme court and High courts, Role of Vice President Irish Constitution: Directive Principles of State Policy, The method of the presidential election, Nominating members of Rajya Sabha.