(1) Wardens must be selected from applicants who have passed an examination that may be required according to the rules adopted and promulgated by the department. A person may not be appointed as a warden until a certificate has been issued to the person by the department to the effect that the person has passed the required examination and is a fit and proper person to perform the duties of the office.
(2) Before entering upon their official duties, state fish and game wardens shall take and subscribe the constitutional oath of office and shall in addition swear or affirm that they hold no other position or office or any position under any political committee or party. The oath or affirmation must be filed in the office of the secretary of state.