The Federal Aviation Administration (FAA) has revised its regulations governing "objects that may affect the navigable airspace."  These rules have not been modified in decades.

  According to Ellen Crum at the FAA, you must now notify the FAA 45 days in advance of any proposed construction instead of the current 30 days.  She added that the rules have been rewritten in plain language, that a lot of FAA practice has been codified, and that the required notices to the FAA have changed (especially concerning private-use airports that have approved instrument approaches).  The good news is that the imaginary surface figures have not changed.

  In addition to the completed rule changes, the FAA, FCC and NTIA are collaborating on the best way to protect aircraft receivers from ground-based interference.  We are told that "a resolution of this issue is expected soon."

  It appears that there are typographical errors in the FAA's write-up, errors that would lead one to believe that the FAA is currently focusing on RFI from the following frequency bands: 88-108 MHz, 6.225-6.525 GHz and 21.2-23.6 GHz.  However, according to FAA's R.J. Balanga, only 88-108 MHz is in the FAA's cross hairs at this time.

  http://earthsignals.com/add_CGC/FAA-0119.pdf

Provided by Steve Blodgett, at Earthsignals.com