If it is a Club Europe ticket (it's not clear from the post) the Same Day Change is probably there, and it would have said so clearly during the booking process. It's reasonably well known which fares get SDC but it's always useful to take a screen shot during the booking process for future reference. The known problem is that sometimes if you make one change the endorsement falls off the booking and then if SDC is the second change the agent can't find it, but that's another reason for taking a screen shot.

The fare basis would show in the e-ticket tab and with ExpertFlyer you can usually get the fare rules there.