Reaching New Heights

It was widely reported a number of months ago that One World Trade Center, which recently laid claim to the title of New York City’s tallest building, might not become America’s tallest building.
The Port Authority and the Durst Organization have changed the tower’s design. Chief Architect David Childs told the New York Times that the co-developers decided to remove a decorative shell from the antenna mast that will top the tower. That change might mean that the antenna is just a utilitarian piece of equipment and would not count towards the official height of the building. It could potentially lower the height of the tower from 1,776 feet to 1,368 feet.
Without the 408 feet of spire, One World Trade Center would not be taller than the Willis Tower in Chicago, which is the tallest building in the United States, standing 110 stories and 1,450 feet tall. So who actually decides these things anyway?
Apparently the Council on Tall Buildings and Urban Habitat gets to make the final determination. They count spires toward the height if it’s part of the architecture and actual design of the building. Antennas or any other apparatus that are simply put on top of a building don’t count. Someone compared it to placing a chair on a roof of a tall building, which certainly wouldn’t be included in the official height.