This section applies only in Queen Anne’s County. The State’s Attorney’s salary is equal to the salary of a judge of the District Court of Maryland. The salary shall be set before the start of the elected term of office. The State’s Attorney is entitled to reasonable expenses as provided in the county budget for the operation of the office and the performance of the State’s Attorney’s duties. Subject to the approval of the county commissioners, the State’s Attorney may appoint one or more deputy State’s Attorneys or assistant State’s Attorneys. The county commissioners shall set the salary of each deputy and assistant State’s Attorney. The State’s Attorney, deputy State’s Attorneys, or assistant State’s Attorneys shall present cases to the grand jury and perform other duties in relation to the grand jury, the circuit court, including the juvenile court, and the District Court that the State’s Attorney considers necessary. The State’s Attorney may not: engage in the private practice of law; or except in connection with the duties of the office, appear professionally in a criminal proceeding in the State.