(a) The 218th Judicial District is composed of Atascosa, Frio, Karnes, LaSalle, and Wilson counties.
(b) The judge of the 218th District Court may impanel grand juries in each county in the district but is not required to impanel a grand jury in any county except when the judge considers it necessary. The judge may alternate the impaneling of grand juries in each county with the judge of any other district court in that county, or the judges may by agreement determine which one of the courts will impanel the grand juries. Indictments within each county may be returned to any district court within that county. All grand and petit juries drawn for one district court in each county are interchangeable with any other district court in that county as if the jury had been drawn for the court in which it is used.