Delegations are reminded that the credentials of representatives and the names of members of the delegation must be issued by the Head of State or Government or by the Minister for Foreign Affairs . Original copies of credentials and names of delegates for the Conference of States Parties to the Convention on the Rights of Persons with Disabilities only should be submitted to the Department of Economic and Social Affairs ( DESA ) ( Attn : Mr. Guozhong Zhang ( e-mail zhangg @ un.org ; room S-2906 ) ) .