Practice Relating to the Prohibition of Certain Types of Landmines
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:
43. Using antipersonnel mines understood as any ammunition attached underneath, above or close to the surface of land or a place designed to be exploded by the presence, proximity or contact of a person and which could incapacitate, wound or kill more than one person. 
Uruguay, Law on Cooperation with the ICC, 2006, Article 26.2 and 26.3.43.
Uruguay participated in all of the preparatory meetings for the adoption of a treaty banning anti-personnel landmines, endorsed the Final Declaration of the Brussels Conference on Anti-personnel Landmines in June 1997, and took part in the Oslo negotiations in September 1997. Uruguay also voted in favour of the UN General Assembly resolutions in support of a ban on anti-personnel landmines in 1996, 1997 and 1998, as well as the relevant OAS resolutions. 
Landmine Monitor Report 1999: Toward a Mine-Free World, available at http://www.the-monitor.org/index.php/publications/display?act=submit&pqs_year=1999&pqs_type=lm&pqs_report=uruguay&pqs_section=.