48 CFR 53.204-1 - Safeguarding classified information within industry (DD Form 254, DD Form 441).
The following forms, which are prescribed by the Department of Defense, shall be used by agencies covered by the Defense Industrial Security Program if contractor access to classified information is required, as specified in subpart 4.4 and the clause at 52.204-2:
(a)DD Form 254 (Department of Defense (DOD)), Contract Security Classification Specification. (See 4.403(c)(1).)
(b)DD Form 441 (DOD), Security Agreement. (See paragraph (b) of the clause at 52.204-2.)