32 CFR 2001.49: Special access programs.
The safeguarding requirements of this Directive may be enhanced for information in special access programs (SAP), established under the provisions of section 4.3 of the Order by the agency head responsible for creating the SAP. Agency heads shall ensure that the enhanced controls are based on an assessment of the value, critical nature, and vulnerability of the information.
(b) Significant interagency support requirements.
Agency heads must ensure that a Memorandum of Agreement/Understanding is established for each SAP that has significant interagency support requirements, to appropriately and fully address support requirements and supporting agency oversight responsibilities for that SAP.