On Sunday March 28th, open qualifying will be held to select members of the US team. Only US citizens can be selected to the US Team.
However, the qualifying test is open to anyone interested is solving interesting puzzles! Also, the puzzles will remain available after the online competition, so you need not participate if you just wand to solve for fun.

For more details please check out
http://wpc.puzzles.com/

I think its really important for members of the Indian team. The puzzles might be a fair indicator of the type / difficulty of puzzles which would appear at the WSC.