I have an award ticket for PHL-DFW-SFO-HKG-DEL and back in business class with stopovers in SFO and HKG. I wish to change the date of travel, but not the route, for PHL-DFW-SFO. My understanding is that there is no change fee involved since there is no routing change, and only a date change.

My questions are these:
1) Is my understanding of no change fee correct?

2) What fare code is the PHL-DFW-SFO booked in? I believe it should be Z. I spent 100K miles for each ticket. I want to check Galileo to see which flight I would like to move to.

Also, I am EXP in case that matters for any of the questions, but I don't think it does. And I am holding paper tickets, which I assume I would have to have re-issued at some point?

Thanks in advance.