The DoD Information Security Program: Protection of Classified Information,
DoD Manual 5200.01, Volume 3, requires ALL DoD services and agencies to use SF 700. According to Enclosure 3, Paragraph 10, sub-paragraphs a and b (pages 39-40):
10. SECURITY CONTAINER INFORMATION. Maintain a record for each container, or vault or secure room door, used for storing classified information. SF 700 with all information blocks completed, shall be used for this purpose. Update the form each time the security container combination is changed.
10.a. Part 1 of SF 700 is not classified, but contains personally identifiable information (PII) that shall be protected by sealing Part 1 in an opaque envelope (not provided as part of the SF 700) conspicuously marked "Security Container Information" and stored in accordance with SF 700 instructions. If the information must be accessed during non-duty hours and a new opaque envelope is not available to replace the opened one, the original envelope should be temporarily resealed, to the extent possible, until Part 1 can be placed in a new envelope the next working day.
10.b. Part 2 of SF 700, when completed, is classified at the highest level of classification authorized for storage in the security container. It shall be sealed and stored in accordance with SF 700 instructions. The classification authority block shall state "Derived From: 32 CFR 2001.80(d)(3))," with declassification upon change of combination.