for some new purpose later. Note: Arrange pages typed  lengthwise  so  they  can  be  read  from  the right. f.  Follow  the  standard-letter  practice  of numbering   only   second   and   later   pages.   If you  have  several  different  enclosures,  number the  pages  of  each  independently.  If  the  pages are  numbered  already,  renumbering  is  un- necessary. g.  When  size,  weight,  or  other  factors prevent  sending  an  enclosure  with  a  letter, send  it  separately  and  type  (sep  cover)  after the  enclosure’s  description. 15.  Signature a.  The  commanding  officer,  officer  in charge,  or  person  “acting”  in  either  position must  personally  sign  documents  that— (1)  Establish  policy. (2)  Center  on  changes  to  the  com- mand’s   mission   and   are   addressed   to   higher authority. (3)   Deal   with   certain   aspects   of military  justice.  In  this  case,  others  may  sign only  if  a  staff  legal  officer  first  finds  that  the commanding  officer’s  signature  is  unnecessary. (4) Are required by law or regulation (e.g.,  ship’s  deck  log). b.  A  commanding  officer  may  delegate signature   authority   to   military   and   civilian subordinates  and  may  authorize  those  subordi- nates  to  delegate  signature  authority  further. Subdelegate  signature  authority  to  the  lowest responsible  person  whose  position  is  reasonably related  to  the  function  involved.  Do  so  in writing, to titles rather than names, and include a   brief   outline   of   the   types   of   documents involved.  When  subordinates  sign  documents under  this  delegated  authority,  they  usually sign  “By  direction.  ” c.  Type  the  signer’s  name  in  all  capital letters  on  the  fourth  line  below  the  text.  If no preference is indicated, use initial(s) and last name. Omit the signer’s rank or a complimentary close.  Start  each  line  of  the  signature  block at  the  center  of  the  page.  End  with  the  word Acting   when   the   signer   has   been   formally appointed  to  replace  temporarily  the  commanding officer  or  a  subordinate  who  signs  by  title.  Put the  term  By  direction  under  the  name  of  a subordinate who may sign official correspondence but  not  by  title. 16.   Copy-To   Block a.  Use  this  optional  block  to  list  ad- dressees outside your activity who need to know the  content  of  a  letter  but  don’t  need  to  act  on it. If you use the copy-to block, keep the number of  activities  to  a  minimum. b.  Type  Copy  to:  at  the  left  margin on  the  second  line  below  the  signature  block. Identify addresses listed in the SNDL by the short titles shown there. List addressees in any order, though  the  internal  offices  of  an  activity  should be grouped for ease of distribution. Check or ar- row  the  intended  addressee  on  each  copy. 17.   Blind-Copy-To   Block a.  Show  the  internal  distribution  only on   the   copies   that   stay   within   your   activity. List  these  internaI  addressees  by  code  in  a blind-copy-to   block. b.   On   certain   copies—never   on   the . original—type  Blind  copy  to:  at  the  left  margin on  the  second  line  below  the  previous  block (the   copy-to   block,   if   you   have   one,   or   the signature  block).  The  word  Code  need  not precede  the  codes  themselves. 18.  Drafter’s  Identification  on  File  Copies a.  Type,  stamp,  or  pen  the  following information  on  the  first  or  last  page  of  the  file copy: (1) name of writer, (2) writer’s office code, (3)  date  of  typing,  (4)  writer’s  phone  extension or room number or both if writer and signer are at some distance from each other, and (5) word- processing  symbols  or  typist’s  identification. b.   The   file   copy   need   not   give   the information   required   by   paragraph   a   if   your activity is so small as to not need these controls or  if  the  information  appears  on  a  document such  as  a  routing  slip  that  will  stay  with  the file  copy. 19.  Identifying  Second  and  Later  Pages a. Repeat the subject shown on the first page   on   the   sixth   line   from   the   top   of   all later pages. b.  Center  page  numbers  1/2  inch  from the  bottom  edge,  starting  with  the  number  2. No   punctuation   accompanies   a   page   number. Note:  Don’t  number  a  single-page  letter  or  the first  page  of  a  multiple-page  letter.  (To  number the  pages  of  a  Top  Secret  document,  follow OPNAVINST   5510.1G.) 10-7