This subchapter applies only to:

1. (1) Harris County; and

2. (2) any other county in which:

   1. (A) the county officials are compensated on a salary basis; and
   2. (B) there is a criminal district attorney or a county attorney performing the duties of a district attorney.

Acts 1985, 69th Leg., ch. 480, Sec. 1, eff. Sept. 1, 1985.