The SPT’s visit took place from 26 to 29 January 2016 and, therefore, their conclusions and observations will be analysed in the next Annual Report for the year 2016. F. PARTICIPATION IN CONFERENCES An Officer of the Mechanism participated in a Conference in Vienna held between 28 and 30 April 2015 on “Strengthening NPMs” organised by the University of Bristol and the Ludwig Boltzamn Institute. G. COOPERATION WITH NATIONAL AUTHORITIES AND OTHER STAKEHOLDERS In the exercise of her mandate, the Commissioner holds regular consultations, either through correspondence or meetings with the competent authorities of detention centres, such as the Chief of Police, the Senior Director of Prisons, the Ministry of Justice and Public Order, the Ministry of Health and the Ministry of Labour, Welfare and Social Insurance. In addition, the Commissioner as NPM. together with her Officers. regularly participates in relevant presentations and lectures organised within the Police Academy. In 2014, the Mechanism set up a Working Group with non-governmental organisations (NGOs), calling these latter involved in matters of detention to participate in the said Group. The establishment of the said Group was considered necessary to exchange experiences and information on places of detention visited by NGOs and the Commissioner, as well as to monitor the implementation of the Commissioner’s recommendations through the regular contacts of representatives of NGOs with persons in detention. Furthermore, on 4 September 2015, Officers of the Mechanism held a meeting with representatives of the Chief of Police to discuss the access of 15