Sec. 407. Each plan commission may establish advisory committees of citizens interested in problems of planning and zoning. In its resolution establishing such a committee, the commission shall specify the terms of its members and its purposes. Each advisory committee shall:
(1) study the subject and problems specified by the commission and recommend to the commission additional problems in need of study;
(2) advise the commission concerning how the subject and problems relate particularly to different areas and groups in the community; and
(3) if invited by the commission to do so, sit with and participate, without the right to vote, in the deliberations of the commission, when subjects of mutual concern are discussed.
A committee shall report only to the commission and shall make inquiries and reports only on the subject and problems specified by the commission's resolution establishing the committee.