As of 2017, SPN changed it's National Bat Policy Rule. All bats Must contain the following stamp on the taper of the bat
The league has decided to implement bat testing in 2016. Initial bat testing will take place at the start of the season. The league will hold bat testing days every second Sunday during the season. This will give anyone the opportunity who purchase bats throughout the season an opportunity to get your bat tested.
All bats in play for the 2018 season must have the following stamp on the taper of the bat.