MIL-STD-6004 (NOTICE 3), DEPARTMENT OF DEFENSE INTEROPERABILITY STANDARD: TACTICAL DATA LINK (TDL) LINK-4 MESSAGE STANDARD (27 AUG 2007)., MIL-STD-6004 is classified CONFIDENTIAL and contains the tactical data link (TDL)Link-4 message standard. This link was known as TADIL C in the past.The distribution of this military standard is restricted to DISTRIBUTION STATEMENT "D", DOD AND DOD CONTRACTORS. All allied releases of this standard requires additional foreigndisclosure authorization.MIL-STD-6004 has been reviewed and determined to be valid for use in acquisition.To obtain a copy of this document, forward the requester抯 DoD contact information,clearance, and need-to-know information to the PA. If internal Service sources are notavailable, the PA will forward approved requests with a cover letter to DAPS authorizingdistribution.