hit by pitch-need ruling

[Marty]

During my sons little league game, a batter was hit by a pitch after the ball hit the dirt in front of him. The batter made no attempt to swing and tried to get out of the way. The umpire ruled a dead ball and the batter was not awarded 1st base, the opposing manager agreed with this call. I have since brought up this situation to several other people and it is running about 50-50 wether the batter is awarded 1st base or not. I say he gets 1st, but I've been unable to find proof of this ruling. Does any one know where I can find an official ruling on this? Thanks