I have been searching all over and all Government employees that handle classified have to sign an oath and a nondisclosure agreement and be debriefed and sign another form when they leave Civil Service, military, Foreign Service, etc. saying that they will not disclose any classified information. But so far I can find nothing about Congress.
Something is wrong about that!
Found it! This is the from the Rules that the Senate Select Committee on Intelligence Operates Under -- Still need the House:
9.6. No member of the Committee or of the Committee staff
shall disclose, in whole or in part or by way of summary, to
any person not a member of the Committee or the Committee
staff for any purpose or in connection with any proceeding,
judicial or otherwise, any testimony given before the
committee in executive session including the name of any
witness who appeared or was called to appear before the
Committee in executive session, or the contents of any papers
or materials or other information received by the Committee
except as authorized herein, or otherwise as authorized by
the Committee in accordance with Section 8 of S. Res. 400 of
the 94th Congress and the provisions of these rules, or in
the event of the termination of the Committee, in such a
manner as may be determined by the Senate. For purposes of
this paragraph, members and staff of the Committee may
disclose classified information in the possession of the
Committee only to persons with appropriate security
clearances who have a need to know such information for an
official governmental purpose related to the work of the
Committee. Information discussed in executive sessions of
the Committee and information contained in papers and
materials which are not classified but which are
controlled by the Committee may be disclosed only to
persons outside the Committee who have a need to know such
information for an official governmental purpose related
to the work of the Committee and only if such disclosure
has been authorized by the Chairman and Vice Chairman of
the Committee, or by the Staff Director and Minority Staff
Director, acting on their behalf. Failure to abide by this
provision shall constitute grounds for referral to the
Select Committee on Ethics pursuant to Section 8 of S.
Res. 400.
http://www.access.gpo.gov/cong ress/senate/srules23.txt
This is the Senate Rules for the 107th Congress for the Senate Select Committee on Intelligence