I have only skim-read some of the replies but to clarify, when this issue was previously discussed on the forum, it was confirmed by a trusted industry insider this is valid, however it is clearly a loophole. You also need to consider whether the potential for an argument may spoil what should be a relaxing time for yourself. The wording of the restriction text is also not particularly favourable as some of the other members pointed out. I would suggest the best course of action is to ask the guard before boarding as suggested upthread, and act accordingly. Most guards would be fine with it as long as you ask.
As with all loopholes, abuse it, draw too much attention to it and you risk it being closed, sharpish in some cases. ALR is not a regulated product.