per diem in lieu of subsistence at rates authorized for employees of agencies under subchapter I of chapter 57 of title 5, United States Code, while away from their homes or regular places of business in the performance of services for the Commission. (2) Travel requirements Members of the Commission are subject to the requirements set forth in chapters 300 through 304 of title 41, Code of Federal Regulations (commonly known as the Federal Travel Regulation), and the Department of State Standardized Regulations governing authorized travel at government expense, including regulations concerning the mode of travel, lodging and per diem expenditures, reimbursement payments, and expense reporting and documentation requirements. 202. Duties (a) In general The Commission shall have as its primary responsibility— (1) review of facts and circumstances of violations of international human rights law and international humanitarian law contained in the annual Country Reports on Human Rights Practices, including other relevant sources