Side events The following special events were held : ( a ) A special session was organized by the Regional Coordination Mechanism - United Nations Development Group ( RCM-UNDG ) Asia-Pacific Thematic Working Group on Youth on 18 September 2013 on the theme `` Young people 's access to sexual and reproductive health and HIV services : what 's law got to do with it '' ; ( b ) A luncheon side event on ending violence against women and girls was also held on 18 September 2013 .