From ASA 2011 March Rules Clarification

[txtrooper]

NFHS allows a runner(s) to pass an obstructed runner without being called out. I like the way they have addressed this play situation.

NFHS Case Book Passing Another Runner

8.6.4 SITUATION E: With R1 on second and R2 on first, B3 hits a ball safely to
the outfield fence. After R1 takes off from second, she is obstructed by F6 and
knocked down and may be injured. The umpire signals obstruction on F6. Both
R2 and B3 pass R1 (who is still on the ground) and subsequently score. F8 finally
throws the ball to F6 who tags R1 between second and third base. RULING:
There is no infraction assessed for passing a runner. Both R1 and R2 score on
the play. R1 is awarded home and scores, as this is the base she would have
achieved had there been no obstruction. (8-4-3b Penalty c)