Sec. 401. (a) Each plan commission shall:
(1) supervise, and make rules for, the administration of the affairs of the commission (in the case of an advisory plan commission) or of the planning department (in the case of an area plan commission or a metropolitan development commission);
(2) prescribe uniform rules pertaining to investigations and hearings;
(3) keep a complete record of all the departmental proceedings;
(4) record and file all bonds and contracts and assume responsibility for the custody and preservation of all papers and documents of the commission (in the case of an advisory plan commission) or of the planning department (in the case of an area plan commission or the metropolitan development commission);
(5) prepare, publish, and distribute reports, ordinances, and other material relating to the activities authorized under this chapter;
(6) adopt a seal; and
(7) certify to all official acts.
(b) ADVISORY─AREA. Each plan commission shall:
(1) supervise the fiscal affairs of the commission (in the case of an advisory plan commission) or of the planning department (in the case of an area plan commission); and
(2) prepare and submit an annual budget in the same manner as other departments of county or municipal government, as the case may be, and be limited in all expenditures to the provisions made for the expenditures by the fiscal body of the county or municipality.