I think it could. As the provision is apparently being understood by law enforcement, once the declaration is made that there's a riot, just having a mask on and not dispersing immediately would make you guilty of this further offence. It could be a mask of George Bush, the Prime Minister, or some world leader that's being worn for legitimate purposes of political dissent. I think once the declaration is read, if the person is wearing the mask and doesn't immediately disperse, he's guilty of not dispersing when directed as well as this offence.
