Do they say what they consider a white person to be?
Such as being white and having a kid with someone who is half white and say half hispanic is not considered a white child?
There were 100's of posts on this topic in the travyon martin thread.
The conclusion is dat duh terrible white gene is passed on through the father's lineage, and MUST go through two generations of white fathers to be considered pure white.
If father is white, father's father is white = white baby. Doesn't matter what the mother's ethnicity is.
Anything else and they're considered "light brown" for any social discussion.
However, if both father and mother are medium brown or lighter then they are white ONLY if you're talking about government assistance programs.
BTW, the actual physical color of the baby doesn't matter.