6 Turning first to the request for a more detailed ESP report, I note that the architectural drawings and the planning report which accompanied the application provide information about environmentally sustainable development features that are proposed to be used in the construction of the building. Further, the letter from Urbis dated 10 October 2003 elaborated these. It is not for me to decide whether the building will satisfactorily incorporate ESD principles; rather it is necessary to determine whether the information that has been provided is sufficient to enable a decision to be made. I am satisfied that the information is sufficient. In reaching my conclusion, I make this observation. If environmentally sustainable design is to be incorporated into buildings, this should be required by the building regulation system and not be principally required by the town planning system. The reason for this is that, if environmentally sustainable design is important, as I believe it is, it ought be incorporated in all buildings, regardless whether those buildings require a planning permit or not. The vast majority of buildings which are erected in Victoria each year do not require a planning permit. Hence the principal approach for ensuring environmentally sustainable development must be by way of the building control system.