ASA Copyrights their material and distributes it as they see fit. At their web site, they always suggest going to your local association for rule books or questions on rules. I would imagine that is to build the strength of the local associations.
The national office contact for the web site, for rule books and other publications and for public relations is Brian McCall (
[email protected].) Perhaps he can give you more detail.
By the way, this information is at ASA's web site,
http://www.asasoftball.com. There might be more on the subject already posted there.