Commercially published looseleaf services usually reproduce the regulations that are applicable to the subject at hand. The text of a regulation in the Code of Federal Regulations always indicates where modifications to the regulation were published in the Federal Register . Conversely, the Federal Register always tells what title and section of the Code of Federal Regulations in which a regulation will eventually be published. The current year's volumes of the Code of Federal Regulations are in the Reference area and on the north side of the first floor and the Core A collection on the south side of the first floor. Some hardcopy previous editions are on the second floor with the government documents.
All previous years are on microfiche on the southwest corner of the second floor.
Title 3, which contains Presidential Proclamations, Executive Orders and other Presidential Documents should remain on the shelves with the current editions, regardless of their year of publication because this volume is not superseded by subsequent editions. The index to the set of volumes of the Code of Federal Regulations has a listing of Public Laws and titles of the United States Code that give a uthority to titles and sections of the Code of Federal Regulations. This index also has a list of indexes compiled by some agencies. Preambles to proposed regulations which discuss the rationale that the agency used in formulating the regulations are not published in the Code of Federal Regulations , but are published in the Federal Register . They can be used for persuasive argument.