Theme Park Health Foods - are they ?

Theme parks - Movie World and Sea World on the Gold Coast, QLD, AU, have banned people bringing their own packed lunches in. They would prefer you eat their foot-long hot-dogs etc. One will now have to queue in their fast-food lanes (I don't know why they call them fast).

What of the patrons who are allergic to nuts, eggs, food colourings, preservatives, gluten etc ?
Patrons who do want to bring a packed lunch will need a pass-out in order to eat in the car-park.

I assume the industry-controlled local council will not flinch, but what of the visiting family who have special needs ? Will they be required to eat in the car-park instead of the park overlooking rollercoasters, aliens, volcanoes or penguins ?