Code of Civil Procedure Article 97
A defendant who has proceeded orally on the merits may not move the court to order the plaintiff to provide a security except in the case where the cause of action requiring the provision of a security becomes known after proceeding on the merits.
中文原文 民事訴訟法第97條
被告已為本案之言詞辯論者，不得聲請命原告供擔保。
但應供擔保之事由知悉在後者，不在此限。
但應供擔保之事由知悉在後者，不在此限。