On occasions when additional contacts were necessary on specific criminal or civil matters, the officials involved in the initial communications could designate subordinates to continue those discussions on the condition that superiors would be advised of the contacts.
The guidelines also included provisions covering grant-making decisions, civil service personnel matters and communications involving Justice's pardon attorney.
The Justice memo comes as the White House issued guidelines of its own Wednesday detailing "prohibited contacts" with other parts of the government, including the Justice Department.