(a) The commanding officer of any force of the organized militia guarding any jail, building, or other place or escorting any prisoner or performing any other act of duty may, if he deems it advisable, prescribe a reasonable distance in the vicinity of the jail, building, or other place, or escort of the prisoner within which unauthorized persons shall not come. Any person coming within the limits so prescribed may be placed in arrest by the military authorities.
(b) Any person coming within the limits prescribed by the commanding officer of any body or force of the organized militia under subsection (a) of this Code section without the permission of the officer, or refusing to depart after being ordered 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.