Regulations of Governing Electric Appliance Contractors Article 13

A registration license shall be issued after application for registration by a Contractor has been reviewed and approved; the format of such registration license shall be stipulated by the central competent authority.The registration license of a Contractor is issued with a 5 years validity, the Contractor shall apply with the competent authority at the level of the municipal government or county (city) government for extension within 3 months prior to the date of expiration and renew the registration license; individuals or business entities failing to apply for extension after the date of expiry or whose application for extension was not approved, the initial registration license shall become invalid upon the date of expiry.The items to be reviewed for renewal under the preceding paragraph include: the matters stated in the application forms, proof of payment of taxes for the most recent period, the Association membership certificate for the current year, and documentary proof that at least one employed person has passed the training or seminar under Article 20 during the validity period of the registration license. If any registered particulars stated on the registration license have changed, the Contractor may handle such change concurrently when applying for renewal.
中文原文 電器承裝業管理規則第13條
承裝業申請登記經審查合格後,發給登記執照;其登記執照格式,由中央主管機關另定之。
承裝業登記執照有效期限為五年,承裝業應於期限屆滿前三個月內,向直轄市或縣(市)主管機關申請展延,並換領登記執照;逾期未申請展延或展延審查不合格者,原登記執照於有效期限屆滿失其效力。
前項展延審查項目,為申請書表所載事項、最近一期完稅證明、當年度公會會員證書,及登記執照有效期限內受僱人員至少一位參加第二十條訓練或講習合格之證明文件;登記執照登載事項有變更者,承裝業得於申請展延時併同辦理。

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