The conditions of this Prize have been varied over the years as it became apparent that no one was going to make the original deadlines.
However it appears that the committee is going to put their foot down.
The current deadline is that the milestones have to be achieved by Dec 2017, and that one company has to have a launch contract in place by Dec 2015.
Currently, two teams have pooled their resources to share a launch vehicle, a Dragon 9. After that, their missions will go separate ways and they will be competing. These are the Astrobotic and Hakuto teams. The Hakuto team is sending two rovers.
The objective is to land a rover on the moon, make it travel 500 metres, and send images and other data. The first prize is 20 million USD, second prize is 5 million, and there is several million dollars available for various other technical milestones.
So it could end up being quite a race.
A third team, to my knowledge, is fairly well placed to have a launch contract in place by Dec 2015, which is the Indus team.