Practice Relating to Rule 31. Humanitarian Relief Personnel
Uruguay’s Law on Cooperation with the ICC (2006) states:
26.2. Persons and objects affected by the war crimes set out in the present provision are persons and objects which international law protects in international or internal armed conflict.
26.3. The following are war crimes:
11. Intentionally directing attacks against personnel … involved in a humanitarian assistance … mission, as long as they are entitled to the protection granted to civilians or civilian objects under the international law of armed conflict.
In 2013, in a statement before the UN Security Council during a debate on the protection of civilians in armed conflict, made on behalf of the Group of Friends on the Protection of Civilians, including Uruguay, the chargé d’affaires a.i. of Switzerland stated:
Parties to conflict too often fail to comply with their obligations under international humanitarian law, which requires all parties to conflict to spare the civilian population from the effects of hostilities. In particular, increasing numbers of humanitarian workers, including medical personnel, have been deliberately harmed or even killed recently; there is thus a clear need to find ways to improve their safety and security, while at the same time humanitarian access to reach those in most need must be maintained and negotiated with all relevant parties. … More must be done, within the framework of the UN Charter, to ensure accountability but also prevent grave instances of deliberate delays or denials of access for humanitarian operations, as well as attacks against humanitarian workers. In this regard, we recall that attacks on humanitarian workers constitute a war crime under article 8(e)(iii) of the  Rome Statute of the ICC [International Criminal Court] and that accountability and legal protection are therefore stronger with an increasing membership in the ICC.