It is a bit confusing and difficult to interpret the rules of trade show labor among different convention centers all over the U.S.
If it is according to guidelines and rules within one show, it appears totally out of order in the other one. Also, the show's labors rules may change drastically from one year to next year, even though the actual venue of the show may not change. But if the venue of the show changes, you must be aware that rules might also change at some level, especially when the new location for the show moves to another city or state.