It being essential to the fundamental philosophy of the American constitutional form of representative government and to the maintenance of a democratic society that public business be performed in an open and public manner, and that citizens be advised of and be aware of the performance of public officials and the deliberations and decisions that go into the making of public policy, it is hereby declared to be the policy of the State of Mississippi that the formation and determination of public policy is public business and shall be conducted at open meetings except as otherwise provided herein.