A regional council of governments shall adopt bylaws for the conduct of its business and shall annually elect from among the representatives to the council a chairman, a vice-chairman, a secretary, a treasurer and such other officers as may be designated or permitted in the bylaws. The bylaws may provide for alternate representatives of the council to attend and vote at any meeting in place of absent representatives and may provide for the organization of a regional planning commission. The bylaws may provide for an executive committee of the council and for additional committees including nonvoting advisory committees. Meetings of the council shall be called pursuant to the bylaws and minutes of all meetings of the council, its committees and other official actions shall be filed in the office of the council and shall be of public record.