Indiana Code Title 10. Public Safety § 10-16-7-11

(1) the civil officer calling out the military force or a law enforcement officer;  or

(2) if a civil officer or law enforcement officer is not present, the officer in command of the troops or the officer's designee;

(1) giving the order to disperse would put the person in imminent danger of loss of life or great bodily harm;  or

(2) the unlawful assembly is engaged in the commission of any felony or is causing violence to a person or property.