Well exactly, the issue was a state modifying an existing agreement between developers/landlords and the federal government. But that wouldn't have to happen i

Well exactly, the issue was a state modifying an existing agreement between developers/landlords and the federal government. But that wouldn't have to happen in Tempelhof, as this requirement wouldn't be passed the same way, it'd just be part of the contract selling the land. And a law from the state, requiring the state to only produce such contracts of sale.