Provided further , That notwithstanding sections 901, 902, and 906 of title 44, United States Code, this appropriation may be used to prepare indexes to the Congressional Record on only a monthly and session basis. Public Information Programs of the Superintendent of Documents salaries and expenses (including transfer of funds) For expenses of the public information programs of the Office of Superintendent of Documents necessary to provide for the cataloging and indexing of Government publications and their distribution to the public, Members of Congress, other Government agencies, and designated depository and international exchange libraries as authorized by law, $32,000,000: Provided , That amounts of not more than $2,000,000 from current year appropriations are authorized for producing and disseminating Congressional serial sets and other related publications for fiscal years 2017 and 2018 to depository and other designated libraries: Provided further , That unobligated or unexpended balances of expired discretionary funds made available under this heading in this Act for this fiscal year may be transferred to, and merged with, funds under the heading Government Publishing Office Business Operations Revolving Fund no later than the end of the fifth fiscal year after the last fiscal year for which such funds are available for the purposes for which appropriated, to be available for carrying out the purposes of this heading, subject to the approval of the Committee on Appropriations of the House of Representatives and the Senate. Government Publishing Office Business Operations Revolving Fund For payment to the Government Publishing Office Business Operations Revolving Fund, $6,000,000, to remain available until expended, for information technology development and facilities repair: Provided , That the Government Publishing Office is hereby authorized to make such expenditures, within the limits of funds available and in accordance with law, and to make such contracts and commitments without regard to fiscal