Regulations Governing Self-verification Conducted by Measuring Instrument Enterprises Article 7

The validity period of a self-verification permit of measuring instrument enterprise is three years commencing from the date of issuance; from three month before the validity period expires to the expiration date, the original applicant may prepare an application form and submit it together with the permit fee and certificate fee as well as the documents listed in the Subparagraphs of Article 4 to the dedicated weights and measures authority to apply for extension; where the qualification is deemed as qualified after the process of examination, a replacement permit certificate shall be issued.The validity period of a replacement permit certificate as referred to in the preceding Paragraph is three years commencing from the day following expiration of the validity period of the original permit certificate. Nonetheless, where application is filed within one month before the original validity period expires and the replacement is not finished before expiration of the original validity period, the validity period of the replacement permit certificate shall be three years commencing from the day of issuance.
中文原文 度量衡業自行檢定管理辦法第7條
度量衡業自行檢定許可證書有效期間為三年,自發照日起算;有效期間屆滿之日前三個月至屆滿日前,原申請人得填具申請書,連同許可費及證照費,並檢附第四條各款文件,向度量衡專責機關申請延展,經審查符合者,換發許可證書。
前項換發許可證書之有效期間,自原許可證書屆滿次日起算三年。
但於有效期間屆滿之日前一個月內申請換發,且未能於許可證書有效期間內完成換發者,其有效期間自發照日起算三年。

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