This section applies only in Allegany County. The State’s Attorney’s salary is 90% of the salary of a judge of the District Court of Maryland in effect on December 31 of the year immediately before the start of the State’s Attorney’s term of office. As determined by the State’s Attorney, the State’s Attorney, a deputy State’s Attorney, or an assistant State’s Attorney shall: present cases to the grand jury; and perform other necessary duties in relation to the grand jury, the District Court of Maryland, and the circuit court, including the juvenile court. The State’s Attorney may appoint: two deputy State’s Attorneys who shall serve full time and whose salaries may not be less than 80% of the salary of the State’s Attorney; and as many assistant State’s Attorneys that the county commissioners authorize and fund. The State’s Attorney shall appoint a county investigator and an assistant county investigator in accordance with §§ 12–1A and 12–1B of the Allegany County Code. The county investigator and assistant county investigator shall be funded in accordance with § 12–1A of the Allegany County Code. The State’s Attorney may not engage in the private practice of law.