Chief judges; designation of cases to be heard in the Twelfth Judicial District. Allows the chief judges of the Twelfth Judicial District General District Court and Juvenile and Domestic Relations District Court to designate by order cases to be heard in courtrooms in the Colonial Heights General District Court or Juvenile and Domestic Relations District Court whose proper, preferred, or permissible venue is laid in Chesterfield County. The bill provides that such designations made by order shall not be subject to objection. Additionally, the bill provides that its provisions shall supersede all other provisions outside the bill related to the venue of cases to be heard in general district court or juvenile and domestic relations district court. The bill also prohibits such use of the City of Colonial Heights courtrooms until the city manager of Colonial Heights and the county supervisor of Chesterfield County have executed a memorandum of understanding detailing the terms and conditions of the use of such courtrooms. The provisions of this bill shall expire at such time that the Twelfth Judicial District General District Court and Juvenile and Domestic Relations District Court courthouse buildings located in Chesterfield County are expanded or otherwise redesigned to suitably accommodate the office and courtroom space for an additional judge and additional administrative staff.