36 C.F.R. § 1120.6
(b) Published indexes. The informational publications available from the A&TBCB may include indexes to materials published or contained in its records. They will include the current indexes required by the Freedom of Information Act to be maintained and made available for inspecting and copying, except as otherwise provided by published order, as noted below. These indexes provide identifying information for the public as to—
(3) Administrative staff manuals and instructions to staff that affect a member of the public.
As promptly as possible after adoption of this part, these indexes will be made available to members of the public. Thereafter, updated indexes or supplements shall be published at least quarterly. However, the Board may determine by order published in the Federal Register that publication of an index is unnecessary and impracticable. In that case the Board shall provide copies of the index on request at a cost not to exceed the direct cost of duplication.