I was underage when I used it, when the shuttle driver asked if I had the years I asked him if they ID on the shuttle or at the entrance of the casino. I stayed on.
EDIT: I guess it does discriminate on age. Having trouble editing OP.
I'm surprised that they didn't ID at the shuttle. My ex loved going to casinos and we been to over 20 in North America taking the shuttle buses. For us they either required ID at the shuttle boarding or the member card at shutting boarding. Of course the member card is free, but you needed to be of age at the casino to get one.
