No officer or employee of the department [financial institutions division of the regulation and licensing department] shall be an officer, director, trustee, attorney, owner, shareholder or partner in any bank, nor receive, directly or indirectly, any payment or gratuity from any such organization, or be indebted to any state bank, or engage in the negotiation of loans for others with any state bank. This provision shall not prohibit being a depositor on the same terms as are available to the public generally, or being indebted to a state bank upon an installment debt transferred to a state bank in the regular course of business by a creditor. Any employee violating this section shall be subject to dismissal by the commissioner [director of the financial institutions division].