Senators' Papers and Archives; Senate Committee and Administrative Archives; Center for Legislative Archives; Senate Rules and Statutes Governing Senate Records; Reports of the Advisory Committee on the Records of Congress.

The Senate Office of Public Records (OPR) receives, processes, and maintains for public inspection records, reports, and other documents filed with the Secretary of the Senate involving the Lobbying Disclosure Act (LDA), the Ethics in Government Act, the Mutual Security Act, and the Senate Code of Official Conduct. As provided by various Senate rules, OPR also handles public financial disclosure, reimbursed travel reports, registration of mass mailings, political fund designations, and supervisors' reports on individuals performing Senate services. The office reviews the filings of and provides guidance to registrants under the LDA.