PUBLIC NOTICE
Federal Communications Commission
445 12th St., S.W.
Washington, D.C. 20554
News Media Information 202 / 418-0500
Internet: http://www.fcc.gov
TTY: 1-888-835-5322
DA 07-1076
March 7, 2007
SUSPENSION OF USE OF RECENTLY RECALCULATED PRESUNRISE AND POSTSUNSET 
SERVICE AUTHORIZATIONS AND DIRECTIONS FOR CONTINUED PRESUNRISE AND 
POSTSUNSET OPERATION DURING MARCH 2007 BY AM STATIONS 
IN AREAS WITH DAYLIGHT SAVING TIME
On March 1, 2007, the Media Bureau (the “Bureau”) released a Public Notice, necessitated by the 
enactment of the US Energy Policy Act of 2005, which increased the effective period for Daylight Saving
Time (“DST”), commencing the period earlier and terminating it later than before.  The Bureau 
announced that, with these changes in local time, it was revising its AM station Presunrise Service 
Authorizations (“PSRAs”) and Postsunset Service Authorizations (“PSSAs”).1  As a result of an 
unanticipated computer problem that produced erroneous power levels on certain of these recalculated
authorizations, the Bureau hereby SUSPENDS use of its recalculated PSRAs and PSSAs until the Bureau 
corrects the computer errors and calculates the correct power levels.
In order to permit AM stations currently operating with PSRAs and PSSAs to continue to do so in 
communities with DST, for the period March 11 (the date on which DST will commence) through March 
31, 2007, licensees should use the April DST “Advanced” powers and time periods shown on their 
current PSRAs and PSSAs for their presunrise and postsunset operations.
The Bureau is in the process of correcting the computer problem that resulted in the erroneous
PSRAs and PSSAs.  After the problem has been corrected, the Bureau will recalculate and publish 
permissible PSRA and PSSA operating parameters for all eligible AM stations and will issue a Public 
Notice advising when this process has been completed.
For additional information, or for any AM station experiencing interference they believe to be the 
result of PSRA or PSSA operation by another station during the month of March 2007, contact Charles 
Miller, Susan Crawford or Son Nguyen of the Audio Division at (202) 418-2700.
By:  Chief, Media Bureau
-FCC-
  
1  See “Media Bureau Modifies Presunrise and Postsunset Authorizations for AM Radio Stations,” Public Notice, 
DA 07-938, dated March 1, 2007.