请教大家一个BUSINESS ACCOUNT的问题

想见ufo

准备注册一个小生意用的银行账户，考虑开bankwest的Business Bonus Account，但是对里面这个收费项目看不懂，希望知道的同学指点一下，谢谢了
Line of Credit Fee
A Line of Credit Fee applies if:
(1) the account has an authorised credit limit that has been quoted for 10 or more days during the fee raising period, whether the account is in debit or credit; or
(2) the account is overdrawn during the fee raising period:
(a) by $1,000 or more; or
(b) for 10 days or more, whether or not consecutive, by any amount;
and Bankwest elects to honour (pay) the transaction which overdraws the account.
The fee raising period is quarterly and the fee is debited to the account in arrears on the last business day of March, June, September and December.
The amount of the fee is calculated using the scale below and is based on the greater of the authorised credit limit or maximum debit balance during the fee raising period.

purplecat

不是都没有人知道吧？不需要都翻译的，大概说一下，这是什么意思吧，谢谢了