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Services are usually delivered by a combination of professionals , volunteers , and those who are directly impacted by the disaster who marshal their social sensibilities to aid their neighbors while helping themselves . The full range of national interests continue to be served by this new policy : supporting law enforcement and national security , protecting privacy and promoting electronic commerce . They are designed to provide content expertise and inform members about current trends and policy issues that impact social work practice and service delivery . Although income is necessary to maintain consumption , saving and investment is also necessary if families and communities are to progress out of poverty over the long term . The Kuurn Kopan Noot Aborigines are thought to have occupied the area prior to European settlement .