E/C.12/2017/1 during conflicts and disasters. Such vulnerability is further exacerbated in the case of undocumented women and girl migrants and refugees, who are reluctant to report such abuses owing to their legal status and because they may lack confidence in the authorities and fear deportation. IV. Data collection as a basis for national rights plans 17. The Committee notes that in a number of cases, the reports of States parties provide insufficient information on the extent to which recognized refugees, asylum seekers and undocumented migrants enjoy the Covenant rights. The Committee urges States parties to collect such data, in order to allow it to assess the extent to which they comply with their obligations under the Covenant. The collection of such data can make a significant contribution to the adoption and implementation of policies aimed at improving, for instance, the access to employment, to education or to health care, of migrants, including undocumented migrants, under the jurisdiction of the State party. V. International cooperation 18. As confirmed in articles 2 (1), 11 (2) (b), 22 and 23 of the Covenant, the realization of the rights enshrined in the Covenant is a common objective of all States parties. As members of the United Nations, they have pledged to cooperate in fulfilling this aim. 12 International assistance and cooperation, in particular, are required in order to allow States facing a sudden influx of refugees and migrants to comply with their core obligations, as defined above. As the Committee made clear in its statement on poverty, such obligations “give rise to national responsibilities for all States and international responsibilities for developed States, as well as others that are ‘in a position to assist’” (see E/C.12/2001/10, para. 16). The Committee is aware that, when confronted by large flows of migrants fleeing conflict or persecution, some States face a heavier burden than others. It sees any measure that States parties adopt to support the realization of the Covenant rights on the territory of other States as contributing to the aims of the Covenant. 12 See Article 56 of the Charter of the United Nations. 5