Justices traded memos about potential ethics rules so secretive last year that they reportedly kept them in envelopes and off email servers.

The United States Supreme Court revealed what some justices touted as a landmark new ethics code last year.

But critics noted that the scandal-plagued institution’s new rules lacked any enforcement mechanisms, making them essentially a 14-page long list of suggestions.

A new leak of secret discussions from behind the bench, published in The New York Times Tuesday, reveals which justices fought to keep the code of conduct toothless.

The Times reported that the court’s nine justices started passing ultra-confidential memos, kept in paper envelopes and off email servers, back and forth at the end of last summer.