(iv) Ad hoc expert groups: one ad hoc expert group meeting on international cooperation against drug trafficking at sea; and one ad hoc expert group meeting on risk-reduction strategies within the framework of the drug control treaties;
㈣ 特设专家组：关于国际合作防止海上药物贩运的一次特设专家组会议；以及关于药物管制条约框架内减少风险战略的一次专家组会议；