Police Duty Act Article 19

When police departments must carry out individual duties and general duties separately to meet the circumstances’ needs, the precincts and stations shall be respectively mobilized as duty units in which police officers were assigned to household visits. If necessary, they may expand the beats and assign other police officers to rotationally carry out the general duties.
中文原文 警察勤務條例第19條
警察局基於事實需要,須將個別勤務與共同勤務分別實施時,得以分局或分駐所、派出所為單位,指派員警專責執行勤區查察;必要時,得將其警勤區擴大之,並另指派員警輪服共同勤務。

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