165.Paragraph 18 requires the NAO to make internal procedural rules.
166.Paragraph 19 provides that, if the procedural rules set a quorum for any NAO meetings, the quorum cannot be met unless a majority of those present are non-executive members.
167.Paragraph 20 allows the NAO to establish committees and sub-committees and to make rules for regulating those committees and sub-committees. NAO employees may serve as committee and sub-committee members. Provided no functions of the NAO are delegated to a committee or sub-committee, those committees and sub-committees may also include persons who are neither NAO employees nor members of the NAO.