New rules covering the permissable bats have been published by the United States Specialty Sports Association. Essentially, all bats must bear the BPF 1.15 mark, or they will be disallowed. Details are summarized below:

USSSA Baseball Bat Rules (effective 2012 season and beyond)

Small Barrel Bats (2-1/4 inches in diameter) - Only those small barrel bats made by approved USSSA licensed manufacturers that are either...

(1) Made with the NEW USSSA Mark (see image below); or
(2) Made with the old USSSA mark; or
(3) Is Wood, shall be allowed in USSSA play.

Small Barrel Bat Comment: The above includes Tee Ball bats that are longer than 23 inches in length. Tee Ball bats 23 inches and shorter in length from approved USSSA licensed manufacturers will continue to be allowed without the NEW or Old USSSA marks.