The commissioner shall receive an annual salary as provided in section two-a, article seven, chapter six of this code and actual expenses incurred in the performance of official business, which compensation shall be in full for all services. The office of the commissioner shall be maintained in the Capitol or other suitable place in Charleston. The commissioner may employ such persons and incur such expenses as may be necessary in the discharge of his or her duties and shall fix the compensation of such employees, but such compensation shall not exceed the appropriation therefor. The commissioner may reimburse employees for reasonable expenses incurred for job-related training and educational seminars and courses. All compensation for salaries and expenses of the commissioner and his or her employees shall be paid at least twice per month out of the State Treasury by requisition upon the Auditor, properly certified by the commissioner.