CAT/C/VNM/CO/1 45. The Committee invites the State party to ratify the Optional Protocol to the Convention and the core United Nations human rights treaties to which it is not yet party. 46. The Committee recommends that the State party issue invitations to visit the country to the Special Rapporteur on torture and other cruel, inhuman or degrading treatment or punishment, the Working Group on Arbitrary Detention and the Special Rapporteur on the situation of human rights defenders. 47. The State party is invited to submit its common core document, in accordance with the requirements contained in the harmonized guidelines on reporting under the international human rights treaties (HRI/GEN.2/Rev.6). 48. The Committee invites the State party to consider availing itself of the technical support, capacity-building and training offered by the Office of the United Nations High Commissioner for Human Rights and, where relevant, by UNHCR. 49. The State party is requested to disseminate widely the report submitted to the Committee and the present concluding observations, in appropriate languages, through official websites, the media and non-governmental organizations and to inform the Committee about its dissemination activities. 50. The Committee requests the State party to submit its next periodic report, which will be its second periodic report, by 7 December 2022. For that purpose, the Committee invites the State party to accept, by 7 December 2019, the simplified reporting procedure consisting in the transmittal, by the Committee to the State party, of a list of issues prior to the submission of the report. The State party’s replies to that list of issues will constitute its second periodic report under article 19 of the Convention. 13