(20 ILCS 1805/38) (from Ch. 129, par. 220.38)

Sec. 38. Commissions to officers shall read to a certain grade in a given branch or corps. Assignment to duty in any unit shall be by order of the Commander-in-Chief. The validity of all commissions shall be subject to formal acceptance and the execution of oath of office prescribed by law.

(Source: Laws 1957, p. 2141.)