If your company is quoted on the stock market the following legislation applies:
This applies to companies incorporated in the UK whose equity share capital is officially listed on the main market of the London Stock Exchange, in a European Economic Area or which deals on the New York Stock Exchange or NASDAQ.
The report must give clear information about your activities and the relevant emissions data. You also need to report year-on-year figures and include intensity ratios like emissions per square foot of sales area or by sales revenue.
The rules apply to buildings where the total useful floor area exceeds 500m2 and which is frequently visited by the public.
You need to display the DEC in a prominent place, clearly visible to the public. You also need to have a valid advisory report which has recommendations for improving the energy efficiency of the building.
The regulations came into place on 9th January 2013.
For more information about DECs, visit the Government website.