States Code, but at rates not to exceed the daily rate paid a person occupying a position at level IV of the Executive Schedule under section 5315 of title 5, United States Code. (e) Security clearances All members of the Commission shall hold appropriate security clearances by reason of their participation on the Commission. (f) Foreign travel Foreign travel for official purposes by members and staff of the Commission may be authorized by either the Chairperson or Co-chairperson of the Commission. 7. Authorization of appropriations There are authorized to be appropriated to the Commission for each fiscal year such sums as may be necessary to carry out this Act. 8. Joint Comprehensive Plan of Action defined In this Act, the term Joint Comprehensive Plan of Action or JCPOA means the Joint Comprehensive Plan of Action, signed at Vienna July 14, 2015, by Iran and by the People’s Republic of China, France, Germany, the Russian Federation, the United Kingdom and the United States, with the High Representative of the European Union for Foreign Affairs and Security Policy, and all implementing materials and agreements related to the Joint Comprehensive Plan of Action.