Section 460. Meetings Open to Public.--(a) All meetings, regular and special, of the board of county commissioners and of all boards, commissions and authorities, created by or operating as agencies of the county, are hereby declared to be public meetings, open to the public at all times.
(b) Nothing contained in this section shall prevent the county commissioners or any such board, commission or authority from holding executive sessions from which the public is excluded, but no final official action shall be taken as to any proposed or existing resolution, ordinance, rule or regulation, or part thereof, at such an executive session.