MCO 5710.7 governs Marine Corps Foreign and Marine Liaison Officer programs and their international agreements.
View MCO 5710.7 on armypubs.army.mil
It sets out the FLNO and MLNO program purpose, distinctions from other liaison arrangements, assignments, and command roles. It requires legally binding agreements for assignments, with an exception for certain Foreign Military Sales assignments.
Per reference (a), all assignments of FLNOs to DoD components and MLNOs to foreign governments shall be established in a legally binding international agreement, or an annex to such an agreement, which shall be negotiated pursuant to reference (c). (paragraph 3)
As an exception to this policy, FLNOs to be assigned to DoD components in support of Foreign Military Sales (FMS) may be assigned pursuant to the terms of a Letter of Offer and Acceptance (LOA) or LOA annex, provided there is a General Security of Information Agreement in place with the FLNO’s government and the LOA contains appropriate elements of information. (paragraph 3)
FLNOs may be assigned to Marine Corps activities to provide interface between the Marine Corps and their parent organizations for programs, projects, or agreements of mutual interest to the two services. (paragraph 3)
MLNOs are normally assigned to foreign defense organizations in direct support of GCC and/or MarFor SC goals and objectives. (paragraph 3)
Per reference (c) the authority to negotiate and conclude all FLNO and MLNO international agreements is hereby delegated to the Deputy Commandant for Plans, Policies, and Operations (DC, PP&O). (paragraph 3)