NATIONAL  SECURITY  AGENCY 
CENTRAL  SECURITY  SERVICE 
Fort  George  G.  Meade,  Maryland 
UNITED  STATES 
SIGNALS  INTELLIGENCE 
DIRECTIVE 
29  June  1987 
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USSID  1 
29  June  1987 
SIGINT  OPERATING  POLICY  (FOUO) 
SECTION  1- PURPOSE 
1.1.   (££y&)   This  USSID  establishes  the  policy  and  procedures  for  the  direction,  control,  and 
coordination  oTTJnrted  States  SIGINT  activities. 
SECTION  2 -AUTHORITY 
2.1.y(£Ot30)  Basic  national  policy  on  SIGINT'  is  contained  in  Executive  Order  (E.O.)  12333, 
dated  4  December  1981.  The  E.O.  establishes  the  U.S.  SIGINT  mission  and  assigns  responsibility  to  the 
National  Security  Agency  (NSA)  for  the  management  of  that  mission.  National  Security  Council 
Intelligence  Directive  (NSCID)  No.  6,  "Signals  Intelligence,"  dated  M  February  1972,  affirms  the  U.S. 
SIGINT  mission,  assigns  to  the  Director,  NSA,  the  responsibility  for  that  mission;  establishes  the 
Central  Security  Service  (CSS)  under  him;  and  defines  relationships  between  NSA  and  other 
departments  and  agencies. 
2.2.  (fO^P^fhe  Secretary  of  Defense  is  the  Executive  Agent  of  the  U.S.  Government 
responsible  forconducting  SIGINT  activities  in  accordance  with  E.O.  12333  and  NSCID  No.  6,  and  for 
the  direction,  operation,  control,  and  fiscal  management  of  NSA.  This  authority  is  implemented  in 
DOD  Directives  S-5 100.20,  dated  23  December  1971,  for  the  National  Security  Agency  and  the  Central 
Security  Service,  and  S-3115.7,  dated  25  January  1975,  for  the  SIGINT  function.  The  Director, 
NSA/Chief,  CSS  (D1RNSA/CHCSS)  is  required  to  ensure  the  technical  adequacy  of  all  DOD  cryptologic 
training  under  the  authority  of  DOD  Directive  5210.70,  dated  3  November  1980. 
SECTION  3  -  RESPONSIBILITIES 
1  (cOuO)  SlGiNT  is  a  category  of  intelligence  infcfTijfor.  comprising,  ei:f~er  i^divr-ija!!-/  or  ;•->  cot 
Communications  intelligence  MOMINT).  c'actromcs  .nt^ligepce  ItU'JT),  a,:c  fore-gn  i^strumcntition  S.gr.c 
(FISiNT),  however  transmitted. 
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USSID  1 
29Junel9S7 
SECTION  6  -  UNITED  STATES  SIGNALS  INTELLIGENCE  DIRECTIVE  SYSTEM 
6  1.  (FC>*5J.  DIRNSA/CHCSS  uses  the  U.S.  Signals  Intelligence  Directive  (USSID)  System  to 
exercise  cdmrol  of  the  SIGINT  operations  of  the  USSS-  The  USSID  System  encompasses  all  of  the 
means  by  which  instruction  may  be  passed  within  the  USSS. 
6.2.  {FOjj&f*Or.\y  USSID,  or  vehicles  authorized  in  USSID,  will  be  used  to  direct  SiGlNT 
operations  o^the  USSS 
6.3.    (FQiru)     DIRNSA/CHCSS  promulgates  procedures  and  controls  for  the  preparation, 
publication,  and  maintenance  of  USSID.
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29  June  1987 
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SECTION  11  -STANDARDIZATION 
.•:p;JSAyCHCSS  cresr::bes  standards  to  be  used  in  $! 
\' i  activities,  ir.c'ud'rc  t^e 
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USSID  1 
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3.4.  (F^foT  The  Service  Cryptologic  Elements  (SCE)*  are  military  units  subordinate  to 
NSA/CSS  for  SIGINT  activities.  The  three  major  SCE  Headquarters  command  and  manage  subordinate 
units.  The  SCE  provide  guidance  and  assistance  to  those  Tactical  Cryptologic  Program  elements 
integral  to  other  commands  in  order  to  ensure  proper  application  of  resources  to  accomplish 
operational  tasks  assigned  by  DIRNSA/CHCSS.  They  provide  the  organizational  structure,  manning, 
and  training  for  subordinate  units.  Operational  information  needed  by  SCE  Headquarters  to 
perform  their  missions  will  be  provided  by  NSA/CSS  or  will  be  developed  by  the  SCE  themselves,  m 
coordination  with  NSA/CSS. 
ijfiuO)  SCE  -  A  term  used  to  designate,  separately,  or  together,  those  elements  of  trie  :J  S  irnv.  ?>iavy.  Air  rO'ce.  and 
Marine  Corps  (previous!/  known  as  Service  Cryptologic  Agenoes  (SCA)  and  Service  Crypro!og«c  Organ. zatic-rt;  pCO»  :ha: 
perform  cryptologic  functions.  The  term  apples,  separately  or  together,  to  the  cryptoiogic  '.raffs  ara  funcnona-  pcrrr-.-.s  cf 
the  U.S.  Army  Intelligence  and  Security  Command  (INSCO.Vt).  the  Naval  Security  Group  Command  CW/StCGSU  or  ?:SG).  ana 
the  U.S.  A«r  force  Electronic  Security  Command  (ESC),  their  subordinate  elements,  and  integral  crypto'cg*  elements  of 
military  tactical  or  combat  commancs.  including  those  of  the  U.S.  Marine  Coras. 
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USSID  1 
29  June  1967 
SECTION  14- TRAINING 
I4.JJ6GFuO)  OIRNSA/CHCSS  provides  guidance  to  program  managers  for  cryptologic  training 
conducted  by  the" military  departments,  and  otherwise  executes  the  responsibilities  assigned  by  000 
Directive  5210.70,  DOD  Cryptologic  Training,  dated  3  November  1980. 
14.2.(Fp#D)  The  Training  Director,  NSA/CSS  (TDNC)  serves  as  the  principal  executive  for 
DIRNSA/CHCSS  in  matters  related  to  cryptologic  training. 
14.3.  &&&$)  DOD  Directive  5210.70  is  implemented  by  NSA/CSS  Circulars  'm  the  40-series. 
These  circulars  are  applicable  to  all  elements  of  the  DOD  engaged  in,  or  requiring,  cryptologic 
training  (including  Service  training  commands  and  selected  schools). 
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