The ISF Playing Rules Commission adopted bat certification standards effective January 1, 2002. Currently, the (ASTM F2219) high-speed batted ball test (100 mph) is used for determining bats allowed to be used in ISF World Championships, World Cups and the Olympic Games. Also included are the qualifying tournaments for both the World Championships and the Olympics.
August 31, 2008 marked the end of the period during which bats that complied with the previous ISF bat performance standard (1.20 BPF) were permitted to be used in ISF play.
Bats containing the ISF 1.20 BPF stamp are NOT permitted in ISF play. All bats must contain the ISF 2005 bat stamp.
Manufacturers that currently participate in the bat certification program are: Axe/Baden, Bass Bats, Combat Softball, DeMarini, Easton, Hillerich & Bradsby (Louisville Slugger), Miken, Mizuno, Rawlings, and Worth.
Any Albin, Anderson Bat Company, Nike, Rip-It or Schutt bat previously ISF certified has expired, so, no bats from either of those companies are permitted in ISF play.