… 10. Free from adverse substances sets requirements for food safety and for a range of protective measures by both public and private means to prevent contamination of foodstuffs through adulteration and/or through bad environmental hygiene or inappropriate handling at different stages throughout the food chain; care must also be taken to identify and avoid or destroy naturally occurring toxins. … 15. … whenever an individual or group is unable, for reasons beyond their control, to enjoy the right to adequate food by the means at their disposal, States have the obligation to fulfil (provide) that right directly. … … 17. Violations of the Covenant occur when a State fails to ensure the satisfaction of, at the very least, the minimum essential level required to be free from hunger. In determining which actions or omissions amount to a violation of the right to food, it is important to distinguish the inability from the unwillingness of a State party to comply. Should a State party argue that resource constraints make it impossible to provide access to food for those who are unable by themselves to secure such access, the State has to demonstrate that every effort has been made to use all the resources at its disposal in an effort to satisfy, as a matter of priority, those minimum obligations. This follows from article 2, paragraph 1, of the Covenant, which obliges a State party to take the necessary steps to the maximum of its available resources, as previously pointed out by the Committee in its General Comment No. 3 (1990), paragraph 10. A State claiming that it is unable to carry out its obligation for reasons beyond its control therefore has the burden of proving that this is the case and that it has unsuccessfully sought to obtain international support to ensure the availability and accessibility of the necessary food. 18. Furthermore, any discrimination in access to food, as well as to means and entitlements for its procurement, on the grounds of race, colour, sex, language, age, religion, political or other opinion, national or social origin, property, birth or other status with the purpose or effect of nullifying or impairing the equal enjoyment or exercise of economic, social and cultural rights constitutes a violation of the Covenant. The right to adequate water is further developed by the Committee on Economic, Social and Cultural Rights in its General Comment No. 15 (2002) on the right to water (arts. 11 and 12 of the Covenant). 53