§ 13. Salaries of officers; expenses. The annual salaries and compensation of the deputy commissioners, the counsel, secretary and all other officers and employees of the department shall be fixed by the commissioner within the limits of appropriations made therefor.

The reasonable and necessary traveling and other expenses of the commissioner, deputy commissioners, secretary, counsel and other officers and employees of the department, while actually engaged in the performance of their duties, shall be paid in accordance with the rules and regulations of the department of audit and control from the state treasury upon the audit of the comptroller, upon vouchers approved by the commissioner.