Sec. 5. (a) A person may not be commissioned as an officer of the Indiana national guard unless the person:
(1) is temperate and of good moral character; and
(2) has successfully passed tests as to physical, mental, and professional fitness as may be prescribed by the laws and regulations applicable to the federally recognized national guard.
(b) In the selection and appointment of commissioned officers, preference shall be given to:
(1) a person with prior active military service;
(2) an enlisted person;
(3) a member of the air national guard; and
(4) a graduate of a school teaching military science.