(a) If a county commission decides to adopt an enhanced emergency services telephone system it shall first prepare a proposal on the implementation of the system and shall hold a public meeting on the proposal to explain the system and receive comments from other public officials and interested persons. At least thirty but not more than sixty days before the meeting, the county commission shall place an advertisement in a newspaper of general circulation in the county notifying the public of the date, purpose and location of the meeting and the location at which a copy of the proposal may be examined.
(b) The proposal and the final plan adopted by the county commission shall specify:
(1) Which telephone companies serving customers in the county will participate in the system;