We are in the design stages of a multistory building (8 stories) and one of our tenenants (will lease/own 2 of the floors) has a process requirements that no window construction is allowed. Is this credit pretty much a dead-end based on the above? or is there a way to demonstrate that due to the process requirements it should be treated as an exemption. Any help will be appreciated. Some of the above threads allude to this but I am not clear.