What are the versions of PDF to be used by the Norwegian government?

The regulation on the use of IT-standards in the public sector. prescribes the use of PDF 1.4-1.6, PDF 1.7 (ISO 32000-1) eller PDF/A (ISO 19005-1).

Where can I find an overview of web national accessibility policies?

W3C has compiled an overview of accessibility policies.

Who is responsible for web accessibility in Norway?

The Ministry of Local Government and Modernisation is responsible for the policy and the Agency for Public Management and eGovernment (Difi) is responsible for monitoring the policy conformance.