(a) In accordance with 5 U.S.C. 552(a)(2), each agency within the Department shall make the following materials available for public inspection and copying (unless they are promptly published and copies offered for sale):
(1) Final opinions, including concurring and dissenting opinions, as well as orders, made in the adjudication of cases;
(2) Those statements of policy and interpretation which have been adopted by the agency and are not published in the
(3) Administrative staff manuals and instructions to staff that affect a member of the public.
(b) Each agency of the Department shall maintain and make available for public inspection and copying current indexes providing identifying information regarding any matter issued, adopted, or promulgated after July 4, 1967, and required by paragraph (a) of this section to be made available or published. Each agency shall publish and make available for distribution copies of such indexes and supplements to such indexes at least quarterly, unless it determines by notice published in the