The Commercial Port Law Article 5

The port police authorities are entitled to establish a port police force in accordance with laws for the purpose of public order at the commercial port area, and to assist personnel in undertaking respective duties.Fire control matters within the commercial port area shall be carried out by the port fire authorities or commissioned local government agencies.While the above- mentioned port police authorities and port fire authorities assist in handling violations within the port, they are also placed under the instruction and monitoring of the Maritime and Port Bureau.
中文原文 商港法第5條
商港區域內治安秩序維護及協助處理違反港務法令事項,由港務警察機關執行之。
商港區域內消防事項,由港務消防機關或委辦之地方政府執行之。
前二項港務警察機關及港務消防機關協助處理違反港務法令事項時,兼受航港局之指揮及監督。

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