(a) At seven o'clock on the first Monday in December following a regular municipal election the board of commissioners shall meet at the usual place for holding its meetings and the newly elected members shall assume the duties of office. Thereafter the board of commissioners shall meet at such times as may be prescribed by ordinance or resolution, but not less frequently than once each month. Special meetings shall be called by the clerk upon the written request of the mayor or two members of the board of commissioners. Any such notice shall state the subject to be considered at the special meetings and no other subject shall be there considered.
(b) All meetings of the board of commissioners and of committees thereof shall be open to the public, and the rules of the board of commissioners shall provide that citizens of the town shall have a reasonable opportunity to be heard any such meetings in regard to any matter considered thereat.