Some leagues might use USA Baseball rules, others might have their own, and some might not have a specific "minus bat drop" rule at all, instead focusing on maximum bat length or weight.
To find the correct bat drop for a specific league, you MUST check:
* The league's official rulebook: This is the definitive source.
* The league's website: Often, rules are posted online.
* The league's commissioner or a coach: They will have the most up-to-date information.
Don't assume a rule based on what you've heard or seen elsewhere. Always refer to the official rules of the specific league your child plays in.