"GPO recognizes that other U.S. Code products exist that are not available from the U.S. Government Printing Office. Among these are the U.S.C.A. (U.S. Code Annotated) and the U.S.C.S. (U.S. Code Service). The U.S.C.A. and U.S.C.S. contain everything that is printed in the U.S. Code but also include annotations to case law relevant to the particular statute. While these publications may be more current, they are not the official version of the U.S. Code that is published by the Office of the Law Revision Counsel."