Last year I asked my bank to configure the account I use for debit card purchases such that instead of allowing an overdraft, it simply declines the transaction.

There are caveats. For instance, if I have $20 in the account and the gas station does a temporary authorization for $1, it will go through. Then if I buy $30 of gas and they post the transaction the next day or so, it could overdraft. Likewise, if I only want $20 of gas and the gas station tries to authorize $50, it won't go through.

Seems that the new legislation will require you to opt-in for overdraft "privileges" instead of having it by default.