The commissioner [director of the financial institutions division of the regulation and licensing department] may appoint and employ such examiners and clerks as the business of his office may require and as may be provided for by law at such salaries, payable out of the salary fund, as may be provided by law. In the event the business of the office shall require, the commissioner [director] may designate one or more of the examiners to act as his deputy with all the powers herein conferred upon the commissioner [director].