Acts contrary to the purposes and principles of the UN are those that are likely to affect international peace and security, peaceful relations between states as well as serious violations of human rights.
exclusion under 1F(c) depends on the existence of serious reasons to consider that part of the responsibility in the actions can be personally imputed to the applicant. The court has to assess whether the facts resulting from the investigation are such as to give rise to serious grounds for believing that the applicant was personally involved in such actions.
the term "particularly serious crime" concerns only criminal offenses that objectively violate particularly important legal interests. Typically, serious crimes include homicides, rape, child abuse, arson, drug trafficking, armed robbery, and the like.