Well, if you haven't reached your victory conditions by they time you reach the default date (120BC?), then you'll get them then, still. But I think getting the victory conditions is easier than waiting till 120BC. I didn't want to make them easy, but I did want to make them achievable.

I don't recall the official reform triggers, but they are different. First one includes building a certain number of a certain level of market. Complex and historical.

I've also altered the Roman Reforms slightly, btw.