Enforcement Rules of Plant Protection and Quarantine Act Article 22

If requested by the importing country, quarantine labels for plants or plant products that are approved for export and have received phytosanitary certificates pursuant to Article 20 of the Act, may be issued by the plant quarantine authority. Quarantine tags for plants or plant products thereof, within are of limited quantity and hand-carried by passengers or by mail may also be issued by the plant quarantine authority.
中文原文 植物防疫檢疫法施行細則第22條
輸出之植物或植物產品依本法第二十條規定取得檢疫合格證明者,得應輸入國要求,由植物檢疫機關發給檢疫標識;其係郵遞或旅客所攜帶者,在規定數量以內,亦得由植物檢疫機關發給檢疫卡。

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