Where, upon the expiration of a reasonable time after a senior police officer has ordered an assembly to disperse under section 36(4), the assembly has continued in being, any police officer, or any other person acting in aid of the police officer, may do all things necessary for dispersing the persons so continuing assembled, or for apprehending them or any of them, and, if any person makes resistance, may use all such force as is reasonably necessary for overcoming that resistance, and shall not be liable in any criminal or civil proceedings for having by the use of that force caused harm or death to any person.