DEC

DECs (Display Energy Certificates).

Are required for Public Buildings which are over 250 square meters, which are visited by the public.

DECs last for 1 year for buildings over 1,000 square meters, 10 years for building over 250 square meters.

Public authorities must display their DEC in a prominent place clearly visible to the public, eg near the building’s entrance.
They can be fined £500 if they don’t.