I guess you didn't read the text of the initiative. The way it is set up, it doesn't matter if structural engineers won't approve building modifications. In that case, either the building owner will qualify for a waiver, in which case the owner will have to pay the city an extortionate amount of fees in lieu of putting a green roof on the building, or the building will not qualify for a waiver. There are limited waiver qualifications. In both cases, the added costs will have led to further deferred maintenance and deterioration of the roof.