FEBRUARY GAME JAM: Theme: LOVE IS A BATTLEFIELD

I am strongly considering participating in this game jam, and if I do, it will be my first game jam.

I have a few questions.
One, I know this is being run by Epic and so the Unreal Engine is kind of a given, but I don’t see it mentioned anywhere in the rules yet. To participate in this jam, does my entry have to run on Unreal Engine 4, or would it actually be okay if I built the game with some other engine/tools?
Second to that, if UE4 is required, will Epic be supplying any sort of free use of UE4 for the duration of the jam?
I don’t mean to sound like a cheapskate, but I just don’t actually have a UE4 license yet because it’s not practical for me to switch engines at this point of my project, and it doesn’t seem reasonable to buy a whole month of license when I would only use it for four days.