Illustration: Joel Finch
The build requirement strip beside the price tag prevents this being built on or moved to an attraction that already has any other quality upgrade.
The ability rulebox prevents any other quality upgrade being built on or moved to this attraction.
Together, these rules ensure that an attraction cannot ever have any other quality upgrade while it has Acceptable Quality, no matter the order in which they are built.
Illustration based on the original Superior Quality design by Mr Cuddington.