Customs Personnel Management Act Article 8

The obtainment of occupational qualification and the probation period of technical customs officers may be conducted, mutatis mutandis, in accordance with the rules governing officers of customs affairs category.
中文原文 關務人員人事條例第8條
關務人員技術類各官稱資格之取得與試用期限,準用關務類人員之規定辦理。

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