it required "property tax certainty." They never defined what that meant. But, it sounds like they wanted to pay an very low PILOT instead of going thru the regular assessment process. PILOT would have required a state law, not a decision of the 3 school boards.
And, they never said if the "property tax certainty" would extend indefinitely to the mixed-use development that would take up over half of the site. Lots of that would have been residential. District 15 said they might have to build a new elementary school for those residents.
The Bears never gave out specifics. They sent out a general idea and expected to get whatever they wanted based on that limited concept.