We have received the following from DESA/DSD:
We are pleased to inform you that the 2018 HLPF side event application is now open. The updated electronic application form can be found at: https://sustainabledevelopment.un.org/hlpf/2018/sideevents
Please make sure to review the updated Guidelines for Organizers of Side events, available here
The deadline for applications is April 30th 2018.