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Date: Friday 14 
December; 1600 est 
To: Electricity Sector Entities 
From: Electricity Sector 
Information Sharing and Analysis Center 
[609-452-8060, x-171] 
The ES-ISAC 
is raising the Threat Alert Level for the Electricity Sector from Threatcon-Low 
TO Threatcon-Medium. 
This is based upon the daily threat briefing and will 
be reviewed daily. It is expected that the Medium level will last for several 
days. 
The document, "Threat Alert Levels and Physical Response 
Guidelines", 
version 1.0, previously distributed is available for indivdual Entity consideration 
in formulating plans. 
This advisory does NOT supersede or conflict with advisories 
from the Nuclear Regulatory Commission, other regulatory agencies, the FBI, 
or local law enforcement. 
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