Fiscal law is of great interest to government lawyers who advise their clients on the use of appropriated and non-appropriated funds. A violation of the Antideficiency Act can have adverse consequences for the agency and for the individuals responsible for the violation. The Principles of Federal Appropriations Law, commonly referred to as the Red Book, is a multi-volume treatise published by GAO concerning federal fiscal law. The publication provides text discussion with reference to specific legal authorities to illustrate the principles discussed, their application, and exceptions. The legal authorities include GAO decisions and opinions, judicial decisions, statutory provisions, and other relevant sources.