This section applies only in Calvert County. The State’s Attorney’s salary is equal to the salary of a circuit court judge. Subject to approval of the county commissioners, the State’s Attorney shall appoint a deputy State’s Attorney and an assistant State’s Attorney, as needed. The county commissioners shall set the salaries of the deputy and assistant State’s Attorneys. The deputy and assistant State’s Attorneys: shall serve at the pleasure of the State’s Attorney; shall perform work as directed by the State’s Attorney; and may present cases to the grand jury, sign indictments and criminal informations, and perform other functions necessary to the operation of the Office. The State’s Attorney shall serve full time and may not engage in the private practice of law.