(a) Before using any military force in suppression of any riot, rout, tumult, mob, or other lawless or unlawful assembly or combination, it shall be the duty of the officer in command of the force, or some person deputed by him, to command the persons composing the riotous or unlawful assembly or mob to disperse and return peaceably to their abodes and businesses. In no case shall it be necessary to use any set or particular form of words in ordering the dispersion of any riotous, tumultuous, or unlawful assembly, nor shall any command be necessary when the officer or person, in order to give it, would be put in imminent danger of bodily harm or loss of life or where the unlawful assembly or mob is engaged in the commission or perpetration of any felony, in assaulting or attacking any civil officer or person called to aid him in the preservation of the peace, or is otherwise engaged in actual violence to person or property.

(b) Any person or persons composing or taking part in any riot, rout, mob, tumult, or lawless combination or assembly who, after being duly commanded to disperse as provided in subsection (a) of this Code section, willfully and intentionally fail to do so shall be guilty of a felony and, upon conviction thereof, shall be punished by imprisonment for not less than one nor more than five years.