Committees hold hearings related to pending legislation and legislation under development. These Legislative hearings are closely related to Policy hearings in that they both involve substantive oversight of government activities and the laws and regulations under which these activities occur. Legislative hearings may feature government witnesses, private sector witnesses, or both. In our study, the determining factor of whether a hearing qualifies as a Legislative hearing is whether it directly relates to legislation, either already proposed or still on the drawing board. Legislative hearings include hearings on the budget or appropriations. In our study, this category also includes hearings on treaties, even though treaties are not technically legislation.