Others simply say they haven't the time to examine every document which crosses their desk. Each facility's contract, especially one for a convention center, is a standard agreement written to cover a range of events from public auto shows to rock concerts. For instance, standard contracts call for the facility to get a cut of the gate at public shows. You don't expect to share an attendance fee at professional meetings. Show managers should always expect to modify a contract to some degree.
Rules governing trade events are complex, and contract wording is complicated.
Any questionable phrases or ambiguous statements should be completely clarified before signing. If a disagreement reaches litigation, the signed contract will govern the results. Contracts tend to be one-sided, favoring whoever wrote them. If they don't understand the peculiarities of contract law in that state, they could have some real problems. Even within the same state, city codes and ordinances will apply to various facilities.