What are the limitations on bat size?

* In age divisions 14 and above, ECTB requires a minus 3 bat.

* In age divisions 12 and under, the bat must have a USSSA 1.15 bpf, USA, or BBcor stamp.

* In 13U age division, the bat must have a USSSA 1.15 bpf, USA, or BBcor stamp and not exceed a minus 5 differential.