Complex sentence: Iran is a signatory to the UN Convention on Civil and Political Rights and as such, is required to eliminate all forms of discrimination, and needs to take specific action in reforming laws that promote discrimination.
Split into simpler sentences: Iran is a signatory to the UN Convention on Civil and Political Rights and as such, is required to eliminate all forms of discrimination. Based on these commitments, the government of Iran needs to take specific action in reforming laws that promote discrimination.