Chapter 26. Disclosure of Lobbying Activities 2 U.S. Code §1601. Findings 2 U.S. Code §1602. Definitions 2 U.S. Code §1603. Registration of lobbyists 2 U.S. Code §1604. Reports by registered lobbyists 2 U.S. Code §1605. Disclosure and enforcement 2 U.S. Code §1606. Penalties 2 U.S. Code §1607. Rules of construction 2 U.S. Code §1608. Severability 2 U.S. Code §1609. Identification of clients and covered officials 2 U.S. Code §1610. Estimates based on tax reporting system 2 U.S. Code §1611. Exempt organizations 2 U.S. Code §1612. Sense of Senate that lobbying expenses should remain nondeductible 2 U.S. Code §1613. Prohibition on provision of gifts or travel by registered lobbyists to Members of Congress and to congressional employees 2 U.S. Code §1614. Annual audits and reports by Comptroller General