A person commissioned as an officer or warrant officer of the National Guard, within the time designated by the Commander-in-Chief after such commission is tendered to the officer, shall take and subscribe to the oath as required by federal law and regulations before a civil officer legally qualified to administer oaths, or before a National Guard officer or warrant officer who has previously taken and subscribed the oath; provided that the oath shall contain obligations of allegiance to the State and to the United States, and in the absence of federal law or regulations upon the subject, the oath shall be as prescribed by the Commander-in-Chief. In case of neglect or refusal to take the oath within the time specified, the officer shall be deemed to have resigned his or her office and a new election shall be ordered or appointment made as required by law. (Amended 2017, No. 113 (Adj. Sess.), § 121.)