Legit to take PSAT in Neighboring State?

<p>For the PSAT, it is the state where you go to school that counts --- not where you live. It does not necessarily reflect on how well the state (public) educational system educates its students: DC has one of the highest cut-offs (223 last year) but one one of the worst public school systems. The cut-off is so high thanks to the large number of private school kids who score high.
Anybody know how exactly they determine the cut-offs? Is it related to the number of students overall, the number who take the PSAT? A ratio?</p>

<p>I think I heard it's the top 2% of all scores.</p>