bundles a series of provisions together as a means of addressing a social or governmental problem; those provisions often fall in different logical areas of the Code. For example, an Act providing relief for family farms might affect items in Title 7 (Agriculture), Title 26 (Tax), and Title 43 (Public Lands). When the Act is codified, its various provisions might well be placed in different parts of those various Titles. Traces of this process are generally found in the Notes accompanying the "lead section" associated with the popular name, and in cross-reference tables that identify Code sections corresponding to particular Acts of Congress. Usually, the individual sections of a statute are incorporated into the Code exactly as enacted; however, sometimes editorial changes are made by the LRC (for instance, the phrase "the date of enactment of this Act" is replaced by the actual date). Though authorized by statute, these changes do not constitute positive law. Legal status The authority for the material in the United States Code comes from its enactment through the legislative process and not from its presentation in the Code. For example, the United States Code omitted for decades, apparently because it was thought to have been repealed. In its 1993 ruling in U.S. National Bank of Oregon v. Independent Insurance Agents of America, the Supreme Court ruled that § 92 was still valid law. By law, those titles of the United States Code that have not been enacted into positive law are "prima facie evidence" of the law in effect. The United States Statutes at Large remains the ultimate authority. If a dispute arises as to the accuracy or completeness of the codification of an unenacted title, the courts will turn to the language in the United States Statutes at Large. In case of a conflict between the text of the Statutes at Large and the text of a provision of the United States Code that has not been enacted as positive law, the text of the Statutes at Large takes precedence. In contrast, if Congress enacts a particular title (or other component) of the Code into positive law, the enactment repeals all of the previous Acts of Congress from which that title of the Code derives; in their place, Congress gives the title of the Code itself the force of law. This process makes that title of the United States Code "legal evidence" of the