Enhance controls at points of entry and the land and sea borders in conjunction with other stakeholders 与其他有关单位合作，加强各入境关口及水陆边界的管制。
2.
A enhance controls at points of entry and the land and sea borders in conjunction with other stakeholders 与其他有关单位合作，加强各入境关口及水陆边界的管制。
3.
Maintain vigilance at points of entry and conduct security operations at land and sea borders based on prevailing threat levels 因应当时的威胁程度，保持各入境关口人员的警觉性，并在水陆边界进行保安行动。
4.
B maintain vigilance at points of entry and conduct security operations at land and sea borders based on prevailing threat levels 因应当时的威胁程度，保持各入境关口人员的警觉性，并在水陆边界进行保安行动。
