Regulations of Governing Electric Appliance Contractors Article 18

A Contractor applying for suspension of business , shall do so for a period not exceeding 1 year, and shall submit its registration license to the competent authority of the municipality or county (city) for custody; the license shall be returned upon application for resumption of business.Where a Contractor ceases business operations or is dissolved, it shall complete an application form and submit it together with its registration license to the competent authority of the municipality or county (city) for cancellation of registration.
中文原文 電器承裝業管理規則第18條
承裝業申請停業,期限不得超過一年,並應將其登記執照送繳直轄市或縣(市)主管機關核存;於申請恢復營業時,發還之。
承裝業歇業或解散時,應填具申請書,連同登記執照送直轄市或縣(市)主管機關為廢止登記。

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