Child and Juvenile Welfare and Rights Protection Act Article 18

If parents have differing opinions on the adoption of a child or juvenile, or if one parent's whereabouts are unknown, one parent may still apply to the court for approval. If the court investigates and finds that the adoption is in the best interests of the child or juvenile, it shall approve it.When the court approves or rejects an application for child and juvenile adoption, it shall notify the special municipality or county (city) competent authority in writing. The special municipality or county (city) competent authority shall conduct necessary visits or other dispositions and make a record.
中文原文 兒童及少年福利與權益保障法第18條
父母對於兒童及少年出養之意見不一致,或一方所在不明時,父母之一方仍可向法院聲請認可。
經法院調查認為收養乃符合兒童及少年之最佳利益時,應予認可。
法院認可或駁回兒童及少年收養之聲請時,應以書面通知直轄市、縣(市)主管機關,直轄市、縣(市)主管機關應為必要之訪視或其他處置,並作成紀錄。

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