"Existing" means the same as defined by the FCC in 47 C.F.R. § 1.40001(b)(4), as may
be amended, which provides that "[a] constructed tower or base station is existing
for purposes of [the FCC's Section 6409(a) regulations] if it has been reviewed and
approved under the applicable zoning or siting process, or under another State or
local regulatory review process, provided that a tower that has not been reviewed
and approved because it was not in a zoned area when it was built, but was lawfully
constructed, is existing for purposes of this definition."
