2011 SWU: Valid on code-shares?
If I book an economy ticket through a code-share partner (JK, A3, etc) on their stock, but the flight is actually operated by CO, can I use one of my 2011 SWU's to upgrade to BusinessFirst?
(I ask because I know that I can't use the *A upgrade program to upgrade code-shares with OnePass miles, so I'm worried that the same rule might apply to the SWU's.)