A committee specifically created by statute is subject to OMA. Even without specific authorization, a committee or subcommittee of a public body may be subject to OMA if it is a policy making body, acts on behalf of the public body with through explicit or implicit delegation of authority. AG OMA Guide, Commentary, p. 8
OMA specifically forbids a public meeting otherwise required to be open to be dissolved into small groups or committees for the purpose of permitting the closing of the meeting.
Meetings of administrative staff when no quorum of public body members is present, are not subject to IPRA, unless authority reserved to the public body has been delegated to staff or even an individual if it is making a binding decision, such as a single hearing officer. AG OMA Guide, Commentary, p. 8