By NFHS on May 11, 2016 softball
The NFHS Softball Rules Book specifically states that the bat must contain the 2000 or 2004 ASA certification mark and NOT be on the ASA non-approved bat list. Therefore, these bats are no longer permitted in NFHS contests. NFHS Rule 1-5-1d is listed below for your convenience.
The bat shall:
d. Meet the 2004 ASA Bat Performance Standard, bear either the 2000 or 2004 certification mark and not be listed on the ASA non-approved bat list as found onhttp://www.teamusa.org/USA-Softball.aspx. Bat barrels made entirely of wood are permitted and need not bear an ASA mark, but shall not exceed 2¼ inches in diameter.