Any officer or enlisted person 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 their superior officer on any day of parade or encampment, or who fails to perform any military duty that may be lawfully required of them, or who uses disrespectful language toward their superior officer or commits any act of insubordination, is guilty of a misdemeanor.