"This upgrade may be used...on any eligible Lufthansa flight..., except when booked in X, I, O, R, N, E." These being award and other no-charge fares.

"This voucher is also valid on all international Lufthansa-operated flights worldwide for a standby upgrade"


The above from the back of a UA 2003 (expiring 3/31/2004) SWU's.