Alternate Title: EO 12293: The Foreign Service of the United States
"The Secretary of State shall, in accord with Section 205 of the Act (22 U.S.C. 3925), consult with the Secretary of Agriculture, the Secretary of Commerce, the Director of the United States Information Agency, the Director of the United States International Development Cooperation Agency, the Director of the Office of Personnel Management, and the Director of the Office of Management and Budget, in order to ensure compatibility between the Foreign Service personnel system and other government personnel systems. [...] The Secretary of State shall make recommendations to the President through the Director of the Office of Management and Budget whenever action is appropriate under Section 827 of the Act (22 U.S.C. 4067) to maintain existing conformity between the Civil Service Retirement and Disability System and the Foreign Service Retirement and Disability System."
Executive Order 12293; EO 12293
National Archives: http://www.archives.gov/