Negotiable Instruments Act Article 21
To exercise or preserve the rights on the instrument, any acts required by a party to a negotiable instrument shall be performed during business hours on a business day of the party. If the party does not have determinate business days or specified business hours, the acts shall be performed during the customary business hours of a customary business day.
中文原文 票據法第21條
為行使或保全票據上權利，對於票據關係人應為之行為，應於其營業日之營業時間內為之；如其無特定營業日或未訂有營業時間者，應於通常營業日之營業時間內為之。