Thanks Ross. Hopefully Mary had it right.
But given the short time available and the choice between paper day passes and the ability to load them onto smart cards, in the interest of pre-purchasing it may be best if Bill could pre-purchase the Day Passes on the paper versions since he won't have access to our smart cards. And given that it's confirmed multiple Day Passes can be purchased, that lends itself even more towards the paper ones. Even if the upper limit is 5, that would still reduce Bill's transactions to 3 or 4 depending on how many are needed.