In general, the requirements of the Act and the policies of this part do not apply to subcommittees of advisory committees as long as the subcommittee reports only to that parent advisory committee and not directly to a Federal officer or agency. However, before establishing a subcommittee under a discretionary committee that is not made up entirely of members of a parent advisory committee, the head of the agency shall follow the same consultation process and document in writing the same determination of need for the subcommittee as is required under § 102-3.60(a) for the creation of a discretionary advisory committee.