perience may be an advantage and some call for due regard to be given to reflecting the different forms of civilization and the principal legal traditions and cultures found around the world; •  Treaty body members must be persons of high moral character; •  Due consideration should be given to equitable geographical participation in membership of the treaty bodies; •  Although only the later treaties contain specific provisions, it is expected that due consideration shall also be given to ensuring balanced gender representation within each committee. With regard to the question of geographical balance, whilst due consideration is required, there is no formal quota for any regional group except in the case of CESCR where the relevant ECOSOC resolution establishes a formula for ensuring geographical balance.3 States parties may nominate candidates from amongst their nationals. Most treaties restrict nominations to one person per nationality, with the exception of the ICCPR and OPCAT4 which allow two nominations per State party. No two nationals of any State party may be members of the same treaty body at the same time. It is however possible for one person to serve on two treaty bodies simultaneously.5 3 T he General Assembly has adopted resolutions on the question of promoting geographical balance of membership of human rights treaty bodies. See for example A/RES/66/153. The Secretariat produced a detailed report on the issue, including an analysis of every treaty body election, in A/ 60/351. 4  PCAT allows States parties to nominate candidates from other States parties. Special rules govern which candidates O are elected. See articles 6 and 7 of OPCAT. Elections to the SPT are conducted in Geneva. 5  ee for example article 17(2), CAT suggesting that members of the Human Rights Committee might also serve as memS bers of CAT if elected. 12