Was the Ballysillan meeting legal?

As Fair Deal first noted, then had taken up by the DUP and finally confirmed by the BBC the Antrim board did break GAA rules when it gave permission for a political rally to take place at Casement Park. But, as several of our readers have noted, what is the position in the City Council allowing the UDA sort out it’s problems at Ballysillan Leisure Centre? Even if a former taoiseach is currently urging government talks with the UDA.