Memorandum for the DCI Regarding the EXCOM/NRO: A Discussion of the Management Issues [open pdf - 536KB]
"This memorandum covers a number of issues concerning the management of the NRO and authority over the NRP, including whether the organization's existence and the title of its director should be declassified. It discusses the pros and cons of an overt NRO as well as whether its director should be an Air Force or Defense Department official. It also raises the matter of issuing a National Security Council Intelligence Directive as a charter for the NRP and NRO. The attached draft directive, never issued, included an annex with the language to be added if it was decided to declassify the organization's existence." The document is undated, but from circa summer 1973.
2008 National Security Archive
National Security Archive: http://www.gwu.edu/~nsarchiv/