STOWAGE   PROCEDURES Classified material must bestowed in the manner prescribed in chapter 5 of the  Department  of  the Navy  Information  and  Personnel  Security  Program Regulation,  OPNAVINST  5510.1.  This  publica- tion outlines the physical security standards and requirements  that  serve  as  a  uniform  guide  for determining the type and degree of protection for classified material. These standards and require- ments are designed to provide for flexibility as well as  adequacy  in  the  physical  security  program. Keys  for  padlocks  used  to  protect  classified material  must  be  given  the  same  protection  as  the material  they  protect.  It  is  essential  that  combina- tions be known or keys be accessible only to those persons  whose  official  duties  demand  access  to the  container  involved.  The  combination  or  key to the security container must be changed at the time  received,  at  the  time  any  person  having knowledge of it transfers from the organizational unit, at anytime there is a reason to believe it has been  compromised,  or  in  any  case  not  less  than every  12  months.  Any  document  showing  the combination  to  a  lock  must  be  of  the  same classification  as  the  material  in  the  container secured  by  that  lock.  Records  of  combinations must  be  sealed  in  an  envelope  and  kept  by  the security  manager,  duty  officer,  or  other  person- nel  designated  by  the  commanding  officer. When  combination  numbers  are  selected, multiples   of   5   (ascending   or   descending)   or personal   data   such   as   birth   dates   and   social security  numbers  should  not  be  used. RECORDS  DISPOSAL An  AK  should  be  able  to  determine  what records  should  be  held  in  the  files  for  a  period of  time  or  what  records  should  be  destroyed  or transferred  for  preservation. Record  disposal  techniques  must  keep  pace with  increased  production  and  dissemination techniques.  Temporary  records  must  be  identified, scheduled,  and  regularly  destroyed,  and  perma- nent  records  must  be  identified  and  marked  for preservation.  The  United  States  Criminal  Code (appendix  B)  provides  for  fines  and  penalties including imprisonment for unlawful and willful destruction  or  removal  of  government  records. OPNAVINST 5510.1 provides for the destruction of  classified  matter.  This  and  other  regulations for  safeguarding  security  information  must  be followed  at  all  times  in  applying  the  provisions outlined in the  Navy  and  Marine  Corps  Records Disposition  Manual,  SECNAVINST  5212.5. TRANSFERRING  CLASSIFIED MATERIAL Matter  classified  as  Top  Secret  must  be transmitted  as  prescribed  by  OPNAVINST  5510.1. Only Secret and lesser classified material may be sent via mail as prescribed by the  Department  of the Navy Official Mail Management Instruction, OPNAVINST 5218.7. All classified material must remain  under  U.S.  custody  and  control  at  all times. Any of the means approved for the transmis- sion of Top Secret material prescribed in chapter 8  of  OPNAVINST  5510.1  may  be  used. Registered mail is used for the transmission of  all  Secret  material,  NATO  Confidential,  and all   other   Confidential   material   mailed   to   an FPO/APO   address. Certified mail may be used for the transmis- sion of Confidential (other than NATO) material addressed  to  contractor  facilities  cleared  for access  to  classified  information  under  the  DOD Industrial Security Program or to any non-DOD agency  of  the  executive  branch. Regular  First-Class  Mail  or  priority  mail should be used for the transmission of Confiden- tial   (other   than   NATO   Confidential)   material addressed to DOD activities located anywhere in the United States and its territories. TURN-IN  OF  CLASSIFIED  MATERIAL Turn-in  of  classified  material  is  handled according   to   the  Department   of   the   Navy Information  and  Personnel  Security  Program Regulation,   OPNAVINST   5510.1.   Personnel handling   classified   items   for   turn-in   must   be cleared to handle classified material up to the level of  the  material  being  turned  in.  Top  Secret  and Secret material is turned in under a continuous chain   of   receipts.   Receipts   for   Confidential material may be required at the discretion of the transmitter. Receipts for hand-delivered material are  obtained  on  the  No.  1  copy  of  the  DD  Form 1348-1, which is returned to the activity and filed in  the  expenditure  invoice  file. When  classified  material  is  mailed  or  shipped, the   special   packaging,   addressing   shipment, and   receipt   procedures   contained   in   OPNAV- INST 5510.1, chapter 8, must be followed. In such cases, the No. 5 or 6 copy of the DD Form 1348-1 is  stamped  or  annotated  with  the  phrase  Con- signee  sign  and  return  this  copy.   When  the receipted  copy  is  returned,  it  is  filed  (with  the retained original) in the expenditure invoice file. 1-9