This chapter applies only to a county that:
(1) is not served by a hospital district; and
(2) is:
(A) a county that:
(i) has a population of more than 46,000 and less than 50,000; and
(ii) is adjacent to the county containing the state capital;
(B) a county that:
(i) has a population of 900,000 or more; and
(ii) borders two counties, each of which has a population of two million or more; or
(C) a county that:
(i) has a population of one million or more;
(ii) contains all or part of a municipality with a population of one million or more; and
(iii) is adjacent to a county with a population of 2.5 million or more.