This section applies only in Carroll County. The State’s Attorney’s salary is the following percentages of the salary of a judge of the District Court of Maryland: 80%, ending on December 3, 2018; 90%, beginning on December 4, 2018; and 100%, beginning on December 3, 2019, and thereafter. A salary increase shall take effect at the beginning of the elected term of office and may not increase during the term of office. The county commissioners shall: provide space for the offices of the State’s Attorney and pay the expenses of the office, including general operating expenses, equipment costs, and reasonable costs for secretarial or stenographic needs; or as determined by the county commissioners, pay a reasonable allowance to reimburse the State’s Attorney for the costs of the operation of the office. The State’s Attorney: may appoint two deputy State’s Attorneys and the number of assistant State’s Attorneys necessary to staff the office; and subject to the approval of the county commissioners, shall set the salaries for the deputy and assistant State’s Attorneys. In addition to the assistant State’s Attorneys appointed under paragraph (1) of this subsection, if both the State’s Attorney and the resident judge of the circuit court of the county consider it necessary and the judge approves, the State’s Attorney may appoint an assistant State’s Attorney. The county commissioners shall set the salary of an assistant State’s Attorney appointed under this paragraph. The State’s Attorney shall serve full time and may not engage in the private practice of law.