Lasiorhinus is correct.
In any ETP/CP, that's the point where pushing ahead to your destination requires the same time as coming back to your departure airport. In case you go OEI just before the ETP/CP, you will return and will be required to have the 30 mins WX holding as reserve.
If you push ahead as Lasiorhinus said, even though you may have enough fuel to land, you will not have your reserves intact, and that's against the rules.
This thread just refuses to die, doesn't it ?