The Administrative Execution Act Article 20

The branch of Administrative Enforcement Agency shall examine people under the custody at least three times per month.When the people under the custody is examined or sent back to the custodian institution, the custodian institution shall be notified of it in writing.
中文原文 行政執行法第20條
行政執行處應隨時提詢被管收人,每月不得少於三次。
提詢或送返被管收人時,應以書面通知管收所。

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