Bats used in ESF Competitions 2017
Bats used in ESF Competitions must have the current ISF logo and / or the ASA 2000 Certification Mark, ASA 2004 Certification Mark, or ASA 2013 Certification Mark (Slow Pitch, Men’s Adult Fast Pitch, Junior Olympic Boy’s Fast Pitch and Men’s Modified only), as shown below
and must not be listed on the Non-Approved Bat List with 2000 or 2004 Certification Mark.
Please check the list carefully: several bats have been added since 2016. Bats on that list cannot be ESF approved.
Reference link HERE
The complete description of the "ESF Bat Check" procedure is available here .