The wording is a bit confusing, but my concern is the ruling. I believe this is a major change in philosophy by NUS compared to the past. I'm not a fan of this interpretation, but it isn't my place to ignore it:
PLAY: With one out, R1 on 2B and R2 on 1B, B4 hits an extra base hit to the outfield. R1 rounds 3B and is obstructed and knocked down. R2 accidently passes R1 as R1 is lying on the ground. The ball is returned to the infield and R1 is tagged out. What is the call?
RULING: When R1 was obstructed between 2B and 3B, the base umpire should signal and call “obstruction.” (Rule 8, Section 5B) The umpire should then rule R2 out when R2 passed R1 with the ball remaining live. (Rule 8, Section 7D EFFECT) When R1 is tagged out between the two bases where the obstruction occurred, the umpire should call “time” and award R1 and all other runners the base or bases they would have reached, had there been no obstruction. (Rule 8, Section 5B[ 2] & [4] EFFECT) This would nullify the out on R2 and both R1 and R2 would be awarded the bases they would have reached had there been no obstruction. In this play, that base appears to be home.