North American design and approval procedures are pretty rigid - esp. with very tall structures. It would be difficult to get approval for something and not expect that it wouldn't become generally publicly available at some point. Tall structures, because there are numerous other considerations involved, can not just whimsically adjust their heights. Flight paths in and out of area airports are one obvious concern, but there a zoning regulations, amongst others.
The FAA 2000' limit is neither a law nor a maximum. It is simply a value above which special permitting is required. Below this value, a developer need only satisfy local FAA requirements for the particular airfield(s) involved or potentially affected.
If this were actually a law, as you questioned above, developers would be completely bound to it. Every bit as much as any other law or by-law.
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Member of the SSPIA Senior Committee. Have a question? Go pester Tony.
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