Ratification CERD: yes in 1969.

Extracts from state reply to Durban Review questionnaire:
The Head of Iran's judiciary produces guidelines regarding procedures to be followed to ensure non-discrimination in the conduct of legal proceedings. A committee for the removal of discrimination has been created as well as a Human Rights Headquarters. The latter receives individual complaints arising from the violation of human rights and fundamental freedoms.

Link to the full document:
http://www2.ohchr.org/english/issues/racism/DurbanReview/docs/session1/MemberStates/Iran.pdf