4. Calls upon all States to review and, where necessary, revise immigration policies with a view to eliminating all discriminatory policies and practices against migrants and to provide specialized training for government policy-making and law enforcement, immigration and other concerned officials, thus underlining the importance of effective action to create conditions that foster greater harmony and tolerance within societies;
4. 呼吁所有国家审查、并在必要时修改移民政策,以便消除针对移徙者的一切歧视政策和做法,并向政府决策和执法、移民及其他有关官员提供专门训练,从而强调必须采取有效行动,创造条件以促进社会内部更大程度的和谐与宽容；