FWIW, the online synopsis was not updated until sometime this afternoon. If he checked in the morning before hitting the road, he would have legitimately thought retention was still open...
With the amount of social media (facebook, twitter and ect) information like this notice has been posted since yesterday and people should keep an eye on any update reguarding so, it's not to say that I wouldn't have blamed him if no one told him and he kept a fish, but a fair number of people today could be heard saying "Hey, you aren't allowed to keep any pinks."
Honestly, DFO really need a better system to show notices when they do changes, but at the same time we have lots of social media posting info so it kinda makes it hard to play the game of "well I didn't know" Sort of like a double edged sword if you ask me.