What the f*** does this notice from AT&T mean?

[hvn_nbr_2]

I mean besides the obvious eternal fact that they intend to screw me in some way or other? Which way do they intend?

I got this postcard in the mail from AT&T. Here is the complete text of it:

OFFICIAL NOTIFICATION
You may contact AT&T to confirm your Outside City Limits (OCL) designation (outside the city or municipal limits of the city or municipality listed as part of your address) and/or speak to an AT&T representative concerning your OCL status by calling 1 800 453-9320. If you indicate to AT&T that you reside outside the city or municipal limits of the city or municipality listed as part of your address, AT&T will follow that indication, unless overridden by the revelant (sic) taxing authority.

Affected states: (list of 28 states, which appear to me to be rather random--big, small, north, south, east, west, central, red, blue, progressive, regressive, etc.)