The global nature of the internet makes it difficult to set limits or boundaries to cyberspace. The International Covenant on Civil and Political Rights (ICCPR) states that "any advocacy of national, racial or religious hatred that constitutes incitement to discrimination, hostility, or violence shall be prohibited by law". The Convention on the Elimination of All Forms of Racial Discrimination (ICERD) prohibits all incitement to racism. Concerning the debate over how freedom of speech applies to the Internet, conferences concerning such sites have been sponsored by the United Nations High Commissioner for Refugees. "Direct and public incitement to commit genocide" is prohibited by the 1948 Genocide Convention.