Related Midwest signed off on the settlement agreement because it called for the company, which is constructing residential towers of its own in several parts of Chicago, to receive $109 million-plus by Oct. 31. If Shelbourne opted to defer that payment until March 31, 2015, Related was to receive $22 million by Oct. 31 and more than $92 million by March 31. If those payments weren't made or Shelbourne doesn't move forward with the plan, Related would take title to the coveted 2.2-acre site.