They've decided that they are the grammar police, so any statement in which the two words 'Palestine' and 'Action' appear, even if they are in two separate sentences, override any niceties of punctuation or part-of-speech-ness. It's ludicrous. I assume protesters could avoid being arrested by simply omitting the word 'action', unless the police then decide that simply 'Palestine' implies 'Palestine Action'.
Asmentioned before, it's a linguistic question that really ought to be followed into the even further regions of ridiculousness, with linguistics professors telling the judiciary that this law is a total ass as it's being prosecuted.