About 1,200 contituencies, experts and observers will attend the Assembly. They were purposively invited from stakeholder form civic groups, state agencies, non-state agencies, political and academic institutions. However general public could register to openly join. 
The missions are to scrutinize and endorse 12 agendas. Those agendas were studied and resolutions were drafted by means of issue-based and area-based deliberative action throughout the country since the kickoff meeting in November 2007. Then the resolutions come out from the National Health Assembly will be legistratively proceeded further on. Eventually resoultions would be complied by responsibles ranging form local to national level regarding to perticular interest. Moreover there will be participants from oversea to share experiences with local participants.
The National Health Assembly is the first health assembly mandated under the newly enacted National Health Act 2007. The Health Assembly is a social innovation of Thailand. It is one of the most inportant social mechanisms to support participatory, constructive and peaceful reconcillation among all stakeholders towards consensus agreement on specific Healthy Public Policy at national level. It was stated as “A process in which the relevant public and State agencies exchange their knowledge and cordially learn from each other through a participatory and systematically organized forum, leading to recommedations on Healhty Public Policies and Public Healthiness”. There are 3 categories of the Health Assembly i.e. area-based (AHA), issue-based (IHA) and national health assembly (NHA). For more detail click www.samatcha.org