Enforcement mechanisms are usually categorized by the type of UN body that receives communications or carries out the monitoring process. There are four broad categories of enforcement mechanisms: (1) charter-based mechanisms, such as the UN Commission on the Status of Women; (2) convention or treaty-based mechanisms, such as the Committee on the Elimination of Discrimination Against Women; (3) mechanisms contained in UN specialized agencies, such as the International Labor Organization or the World Health Organization; and (4) rapporteurs appointed by the General Assembly, such as the Special Rapporteur on Violence Against Women. Each mechanism monitors either a specific human rights issue or adherence to a particular treaty.