Mr. Seán Armstrong:

It is not dissimilar to what we have done with BER certificates. We developed the BER methodology which we then used to set the performance requirements for buildings. We then advanced the performance requirements for buildings. As we advanced the performance requirements for buildings, we saw the technologies change. The walls got wider, we went to triple glazing, we improved our ventilation system and we introduced different types of renewables. However, we have to have the performance methodology.