One of the most commonly used means is the establishment of oversight committees that can force agency officials to explain their activities to them. Budgetary actions and legislative investigations are the other means of oversight in relation to the legislative and executive functions of these agencies. In relation to budgetary actions, Congress ensures control of the legislative and executive functions of administrative bodies by determining the budget and allocation of resources for the various bodies. The allocation of funds determines the type of work to be performed and programs to be implemented by the administrative agency. In this case, Congress will not be able to grant funds for activities it does not like or require expenditures for projects it does like. With respect to legislative investigations, the President can issue executive orders limiting the powers of these agencies or resulting in the initiation of investigations. Additionally, Congress can repeal an agency's enabling status or amend legislation to force the agency to comply with its wishes. Thus, constitutional directives for legislative and executive actions are geared toward repealing an agency's authorizing statute while statutory directives focus on amending an agency's authorizing legislation. Appointments to these agencies are political appointments by the President subject to the advice and consent of the Senate, which also plays a crucial role in the removal of such agencies