under sections 41301 through 41305 of title 49, United States Code, or exemption application under section 40109 of that title of an air carrier already holding an air operators certificate issued by a country that is party to the U.S.-E.U.-Iceland-Norway Air Transport Agreement where such approval would contravene United States law or Article 17 bis of the U.S.-E.U.-Iceland-Norway Air Transport Agreement. (b) Nothing in this section shall prohibit, restrict or otherwise preclude the Secretary of Transportation from granting a foreign air carrier permit or an exemption to such an air carrier where such authorization is consistent with the U.S.-E.U.-Iceland-Norway Air Transport Agreement and United States law. 414. None of the funds made available in this Act may be used to send or otherwise pay for the attendance of more than 50 employees of a single agency or department of the United States Government, who are stationed in the United States, at any single international conference unless the relevant Secretary reports to the House and Senate Committees on Appropriations at least 5 days in advance that such attendance is important to the national interest: Provided , That for purposes of this section the term international conference shall mean a conference occurring outside of the United States attended by representatives of the United States Government and of foreign governments, international organizations, or nongovernmental organizations. 415. None of the funds appropriated or otherwise made available under this Act may be used by the Surface Transportation Board to charge or collect any filing fee for rate or practice complaints filed with the Board in an amount in excess of the amount authorized for district court civil suit filing fees under section 1914 of title 28, United States Code. 416. (a) All unobligated balances, including recaptures and carryover, remaining from funds appropriated in division K of Public Law 115–31 for Department of Transportation-Office of the Secretary-Salaries and Expenses ,