The Commission shall meet on the call of the Commission Chairman upon five (5) days' written notice to each member from the secretary, except that a meeting may be held without notice whenever those not attending waive in writing or by telegram addressed to the secretary of the Commission their right to notice of such meeting. All meetings of the Commission shall be open to the communications media and public. Four members of the Commission shall constitute a quorum and the vote of four members shall be necessary for any action taken by the Commission. No vacancy in the membership of the Commission shall impair the rights of a quorum to exercise and perform all of the rights and duties of the Commission. The secretary of the Commission shall cause to be recorded an accurate written record of the actions and proceedings of the Commission and shall keep such records open for public inspection for as long as the Commission or any obligations thereof exist.