"The FCC’s TV spectrum repack plan — which it laid out in a Sept. 30 public notice and was the subject of a three-hour webinar from FCC headquarters Oct. 17 — is receiving a lukewarm response from industry players."
"Among the concerns are the lengthy process of obtaining FAA permission to modify tower height; time needed to acquire land-use permission, building permits, zoning waivers and other local permissions to modify towers; resource availability; weather delays; and TV viewer education about the consequences of the repack."
"With TV broadcasters moving to lower frequencies as part of the repack, the new antennas they will use will be taller than existing ones."
"Coupled with the fact that most antennas in the United States are top-mounted, the increase in tower height could mean that 800 requests may be filed for relatively time-consuming FAA obstruction evaluations."TVNewsCheck, October 20, 2016 10:05 AM EDT ► Link
Link to the FCC's webinar is in this article and the FCC homepage.