ASA approved bats

[IRISHMAFIA]

Originally Posted by Insane Blue

There is no such thing for bats made after the 2000 standard came to be.
Here is a better link for bats and so on from ASA . Amateur Softball Association of America

If you read #3 this will tell you the only way a bat can have no certification mark and still be legal and that is

I think the point is that the bats were NOT grandfathered in anywhere. That would insinuate they were approved bats. The only thing the rule allows is for those bats to be exempt from the requirements of being on the list and having the certification stamp attached.

The original guideline for bats not bearing a certification stamp was that the bat would pass the present day testing and were manufactured prior to 1995 (now 2000). Whether these bats are legal to use in a game is solely at the umpire's discretion that the bat met these requirements. Since 2000, all bats must be stamped and on the approved list.