The combination of a security container used for the storage of classified material is assigned a security classification  equal  to  the  highest  category  of  classified material authorized to be stored in the container. Records  of  combinations  are  sealed  in  an  envelope (Standard Form 700) and kept on file in a central location designated by the commanding officer. Cipher Locks Cipher locks and safe combinations are handled in accordance with guidelines found in the  Security Manual. With the addition of electrically actuated locks (that is, cipher and magnetic strip card locks), this type of lock still does not afford the degree of protection required for classified information. They may NOT be used as the primary means to safeguard classified material.  Cipher  or  magnetic  strip  card  locks  are normally used for access to an area only. GENERAL  MARKING REQUIREMENTS Classified documents and material must be clearly and conspicuously marked. Special markings, such as LIMDIS and Restricted Data, are normally placed near the  classification  markings.  These  markings  inform and warn recipients of the classification assigned and indicate  the  level  of  protection  required.  These markings  also  identify  the  information  that  must  be withheld from unauthorized persons. Top Secret, Secret, and Confidential classification markings must be stamped, printed, or written in capital letters larger than those used in the text of the document. These security markings should be red in color, when practicable, and be placed at the top and bottom center of  each  page. All reproductions or copies of classified materials, regardless of form, must bear clearly legible security classification markings and notations in the same manner  as  on  the  copied  or  reproduced  material. Copying equipment does not always clearly reproduce all colors of ink or marginal images. If the reproduction process  does  not  clearly  reproduce  the  security markings  appearing  on  the  original  copy,  all  copies must be marked in the same positions and size as on the original. Paragraph markings are required for classified documents. The appropriate security markings are placed  at  the  beginning  of  the  classified  paragraph.  The symbols  used  to  indicate  paragraph  classification  are (TS) for Top Secret,(S) for Secret, (C)for Confidential, and (U) for Unclassified. It  is  not  uncommon  to  see  foreign-originated classified  information  in  U.S.  messages  and  documents. Paragraphs  that  contain  foreign-originated  classified information  must  be  properly  marked;  for  example, “U.K.(C)”  or  “NATO(S).” At the beginning of Restricted Data and Formerly Restricted  Data  paragraphs,  use  the  appropriate classification symbol with the abbreviation “RD” or “FRD,”  such  as  “(S-RD),”  “(C-FRD).” Titles and subjects are classified according to their content, regardless of the overall classification of the document.  Normally,  the  symbols  indicating  the classification  assigned  to  a  title  or  subject  are  placed  in parentheses immediately following the item, as in the following   example: SPECIAL-HANDLING  MARKINGS In  addition  to  security  classification  categories, other markings also appear on some documents and messages.   Among   these   markings   are   such designations  as  Restricted  Data  (RD),  Formerly Restricted  Data  (FRD),  LIMDIS,  FOUO,  EFTO, SPECAT,  PERSONAL  FOR,  NATO  RESTRICTED, and ALLIED RESTRICTED. Restricted Data and Formerly Restricted Data The marking “Restricted Data” (RD) is applied to all  data  concerned  with  the  design,  manufacture,  or  use of nuclear weapons. Also included in this category is the special nuclear material used in energy production. The marking “Formerly Restricted Data” (FRD) pertains to defense information that has been removed from the RD category but must still be safeguarded as classified  defense  information.  FRD  material  cannot  be released to foreign nationals except under specific international agreement. LIMDIS (Limited Distribution) The LIMDIS designator is applied only to classified messages which, because of the subject matter, require limited distribution within the addressed activity. 5-5