Any officer or enlisted man or woman of the National Guard or Naval Militia who willfully fails to attend any parade or encampment, or who neglects or refuses to obey the lawful command of his or her superior officer on any day of parade or encampment, or who fails to perform any military duty that may be lawfully required of him or her, or who uses disrespectful language toward his or her superior officer or commits any act of insubordination, is guilty of a misdemeanor.