Inian law refers to the system of law which operates in India. It is largely based on English common law because of the long period of British colonial influence during the British Raj period. Much of contemporary Indian law shows substantial European and American influence. Various acts and ordinances first introduced by the British are still in effect in modified form today. During the drafting of the Indian Constitution, laws from Ireland, the United States, Britain, and France were all synthesised to get a refined set of Indian laws as it currently stands. Indian laws also adhere to the United Nations guidelines on human rights law and environmental law. Certain international trade laws, such as those on intellectual property, are also enforced in India.