CLASS X

a Sea Org auditor trained up through Class X (thus able to deliver L10). He can do the lowest grade and worst cases and the medium ones and the high ones. He is a sort of pan- (all-) grade, all-case-conditions auditor. —FEBC - How to Post an Org Approved Glossary

an advanced Scn course available only on Flag. It teaches L-10 OT, an upper level rundown whose basic tech comes from research into increasing OT powers. (CG&AC 75)