A/HRC/43/31 building, in line with its mandate, in consultation with and with the consent of the State concerned. 90. Pursuant to the request of the Assembly, OHCHR created in 2015 the treaty body capacity-building programme, implemented by a group of staff at OHCHR headquarters in Geneva and by a number of capacity-building officers in OHCHR regional presences. The programme aims: (a) To organize regional train-the-trainers events annually, to provide potential trainers from States with the knowledge and skills to support States parties to treaties in their engagement with the treaty bodies; (b) To establish a roster of trainers from among State officials with extensive experience in treaty body reporting, to create a community of learning and to facilitate the exchange of lessons learned from other roster members; (c) To provide requesting States parties with assistance on the establishment of national mechanisms for reporting and follow-up, and to prepare a study and practical guide on key features of mechanisms; (d) To provide requesting States parties with assistance for treaty-specific reporting, including for the preparation of common core documents; (e) database; To maintain and update the Universal Human Rights Index and the treaty body (f) To create a capacity-building portal on reporting to the treaty bodies; (g) To launch a general training manual on treaty reporting; (h) To develop treaty-specific training modules, including online. 91. The treaty body capacity-building programme has had a number of successful outcomes, including the publication of National Mechanisms for Reporting and Follow-up. This guide aims to provide training facilities with information on the treaty bodies, and the tools and resources necessary to develop a course on reporting to them. Its objective is to help States gain knowledge on the United Nations treaty body system, particularly the reporting processes involved and the roles of different stakeholders. In this way, States parties are enabled to fulfil their reporting obligations and to engage with the treaty bodies in a sustainable and meaningful way. 92. The programme has also overseen the publication of a training guide, which comprises two parts: a manual on the treaty body reporting process; and a facilitator’s guide on reporting. 93. The programme is furthermore developing treaty-specific training manuals and trainer guides. Completing the current training guide on the Convention on the Rights of Persons with Disabilities, a practical guide for national preventive mechanisms on torture prevention was launched on 2018. Trainer guides on the International Covenant on Civil and Political Rights and the International Covenant on Economic, Social and Cultural Rights are being prepared. OHCHR contributed to the development by UN-Women of an online training programme on the Convention on the Elimination of All Forms of Discrimination against Women. All of the afore-mentioned publications and online training courses are designed to help States to increasingly engage with the international human rights mechanisms. 94. Between 2015 and 2017, the capacity-building programme enhanced the skills and knowledge of more than 350 State officials from 135 States, who have since become trained trainers on treaty reporting. Furthermore, technical assistance has been provided to some 70 States at the national level on specific human rights treaties and on reporting. This assistance has resulted in new ratifications; the submission of updated common core documents and outstanding State party reports; more constructive dialogue with the treaty bodies; and greater interest in a number of States in establishing a national mechanism for reporting and followup (see A/73/309). 95. The overall number of ratifications of the 18 human rights treaties and optional protocols, including declarations recognizing the competence of a committee to consider individual communications, rose from a total of 2,300 in 2015 to 2,386 in 2017, a 3.7 per 14