The teeth for fiscal law comes from the Antideficiency Act (ADA), which provides that no one can obligate the Government to make payments for which money has not already been appropriated. The ADA also prohibits the Government from receiving gratuitous services without explicit statutory authority. In particular, an ADA violation occurs when a Federal agency uses appropriated funds for a different purpose than is specified in the appropriations act which provided the funds to the agency. The ADA is directly connected to several other fiscal laws, namely the Purpose Act and the Bona Fide Needs Rule.