Sec.  11.18   EAS Designations.

   (a) National Primary (NP) is a source of EAS Presidential messages.

   (b) Local Primary (LP) is a source of EAS Local Area messages. An LP source
   is responsible for coordinating the carriage of common emergency messages
   from sources such as the National Weather Service or local emergency
   management offices as specified in its EAS Local Area Plan. If it is unable
   to carry out this function, other LP sources in the Local Area may be
   assigned the responsibility as indicated in State and Local Area Plans. LP
   sources are assigned numbers (LP–1, 2, 3, etc.) in the sequence they are to
   be monitored by other broadcast stations in the Local Area.

   (c) State Primary (SP) is a source of EAS State messages. These messages can
   originate from the Governor or a designated representative in the State
   Emergency Operating Center (EOC) or State Capital. Messages are sent via the
   State Relay Network.

   (d) State Relay (SR) is a source of EAS State messages. It is part of the
   State Relay Network and relays National and State common emergency messages
   into Local Areas.

   (e) Participating National (PN) sources transmit EAS National, State or
   Local Area messages. The EAS transmissions of PN sources are intended for
   direct public reception.

   (f) Non-participating National (NN) sources have elected not to participate
   in the National level EAS and hold an authorization letter to that effect.
   Upon activation of the national level EAS, NN sources are required to
   broadcast the EAS codes, Attention Signal, the sign-off announcement in the
   EAS Operating Handbook and then stop operating. All NN sources are required
   to comply with  Sec. 11.51, 11.52 and 11.61. They may transmit EAS State or Local
   Area messages at any time without prior notice.