Originally Posted by
PTahCha
I am not sure where you are sourcing the T&C from, since the link doesn't work. Here's what's listed on United's website:
I am pretty sure that's what listed on the paper SWU as well.
Here is the link again -
www.united.com/page/article/1,,50027,00.html
I agree with you that L is per se not valid. HOWEVER, if you scroll down to "Systemwide Upgrade terms and conditions" and then to "1a" there are the exceptions with "LH Stand By Paper Vouchers on the day of travel" @:-)