This part shall take effect when:
- Three (3) or more of the counties of Dickson, Hickman, Lewis, Perry and Wayne and the cities of Dickson, Centerville, Hohenwald, Linden and Waynesboro are authorized by a vote of two-thirds (2/3) of their respective governing bodies to become members of the authority;
- Evidence of such authorization is proclaimed and countersigned by the presiding officer of each ratifying county and city and certified by that officer to the secretary of state; and
- The governing bodies of all governments voting to become members of the authority have indicated their willingness to appropriate sufficient funds to provide for the initial administration of the authority.