American (sic) Softball Association v Bobby Sox

[Dakota]

I read the news article in the umpire attacked thread, and found this quote...

The American Softball Association rules state that defensive players must not block bases, while Bobby Sox rules say that runners should slide into a base if a play is being made.

Besides wondering who the American Softball Association is (), and noting that the newspaper writer forgot the part about having the ball or about to receive the ball (), does Bobby Sox have a must slide rule?

I also found it very curious that the game was apparently being played under two different rule books - one team playing by Bobby Sox and the other by ASA rules.

The quotes from the participants seemed to indicate they had not worked out the rules in advance, and this entire incident stemmed from the must slide rule.