Ratification CERD: yes in 1975, Belgium has also agreed to individual petitions under Article 14.

Extracts from state reply to Durban Review questionnaire:
Belgium adopted a Plan of Action in 2004 on racism, anti-semitism and xenophobia, a 10-point plan that focuses on the applicability of anti-discrimination legislation, follow-up of complaints, internet as medium of racist and anti-semitic ideology, distribution of racist materials, fight against bigotry (creation of "democracy platforms"), evaluation of media work, police services, state security, measures of public protection and the creation of tolerance barometers. Belgium has enacted several laws against racism since 2001.

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