You will not find it in the Guidelines. The Supreme Directive is a tool used by Staff when two members cannot keep their personal feud out of the forums and cyber-stalk each other in the forums. A PM is sent to both members and it basically states the following...
The two of you are not allowed to QUOTE, POST or COMMENT on a thread that the other one starts, or have ANY interaction with each other in any forum on ECCIE, and yes, that includes the ISO/Alert Forums and Review Threads.
First offense is two weeks, then a month, then six weeks etc, etc....
Any noncompliance shown toward the Supreme Directive is addressed with a ban as stated above.