I took the signal light gun test back in '96 and passed. Was given a SODA which later became converted to a LOE. Am I grandfathered in when I go for my next medical, or do I have to go through the new vision tests? I have a 3rd class now, but what if I want to upgrade to 2nd or 3rd? I seem to remember the LOE saying it was good for any class (but I'll have to dig it out).