Regulations Governing the Audit and Adjustment of Deposit and Other Liability Reserves of Financial Institutions Article 9

The calculation period used as the basis for calculating the amount of required reserves to be set aside by financial institutions shall be from the first day of each month through the month's end, provided that for financial institutions starting up operations midmonth, calculations for the startup period shall begin on the date that operations begin.The daily average balance of required reserves (hereafter referred to as "Required Reserve Balance") for each period shall be the sum of the products of the daily balances of the various types of deposits and various other liabilities for which reserves are required multiplied by the legally required reserve ratios, divided by the number of days of the period.For the purpose of calculation, the balances for the previous business day shall be taken as the balances on a non-business day for the various types of deposits and other various liabilities.Financial institutions that settle accounts on a daily basis may, exempt from the restriction of the preceding Paragraph, apply for a daily listing of account balances with the Bank.
中文原文 金融機構存款及其他各種負債準備金調整及查核辦法第9條
金融機構應提存準備金之計算期間為每月第一日起至月底止。
但新開業金融機構開業當期自開業日起算。
每期應提存準備金之日平均額(以下簡稱應提準備額)係以應提存準備金之各種存款及其他各種負債之每日餘額乘以法定準備率,所得各乘積之和除以當期天數。
非營業日各種存款及其他各種負債以其前一營業日之餘額列計。
金融機構每日進行結帳作業者,得向本行申請以每日帳列餘額列計,不受前項規定限制。

English translation for reference only; the Chinese text prevails. Not legal advice.