List three ways congress has tried to regulate the activities of lobbyist

Lobbyist are activists who seeks to meet people in the government so as to persuade them to enact legislations that favor their groups.The congress has tried regulating them by; First, placing severe restrictions on the gifts, meals and expense paid travel that public officials may accept from the lobbyist. Secondly, the congress passed law in 1995 requiring the lobbyists to report what issues they were seeking to influence, how much they were spending on the same and also their clients. Thirdly, the congress also passed a law in 2007 and the house revised the ethics rules after the story of John Abramoff's success in the lobbying and scheming business.