The responsible organizations for publishing National Annexes are the National Standards Bodies and/or the national or regional authorities. Preferably it should be the National Standards Body (NSB). See FAQ Are all National Annexes and National Datasheets publicly available? for an extensive explanation of the different options.
The actual development of the National Annexes for the NSBs or authorities is typically the work of experts who are also involved in the development of national and/or international energy performance methodologies, together with all stakeholders concerned.
Note that the development of NAs involves interconnecting national standardization committees on heating, cooling, ventilation, thermal insulation, lighting, overall EPB, etc. So attention should be given to establishing a strong relation between these national focus groups.
They usually have close contact with the public authorities for regulatory purpose. The NAs only focus on the assessment method, the public authorities will set the minimum EP requirements. But these are two sides of the same coin (see FAQ Why is international harmonization of energy performance calculation methods important? on the importance of international harmonization of the EP calculation procedures).
So, in case the NA -if intended to be used for regulatory purpose- is published by the NSB, interaction between the NSB and public authorities is essential.
Sometimes the national association of building engineers/consultants takes the lead, or a national or regional energy agency In other countries an educational institute or research organization is asked to take the lead.
In most cases the funding comes (directly or indirectly) from the national or regional authority responsible for the building regulations. However, there is a wide variation in funding, depending on the country, on the way the National Standards Body is financed, on the involvement of stakeholders, etc.
2022-04-02