This standard applies to the following: a. New and existing buildings. b. The building site or campus on which the buildings are located and all accessory and appurtenant structures@ energy-using systems@ and equipment located on the building site. This standard establishes requirements for the following: a. Disclosure of building energy use via a rating and supporting summary documentation. b. Modeling of buildings and building sites to estimate or predict building energy use for an asset rating. c. Determining energy use@ with metered data@ of buildings and building sites to establish an operational rating. d. Acceptable credentialing criteria for individuals applying this standard and reporting building energy use. e. Format and content of the rating disclosure@ the label@ and supporting documentation. This standard is intended to be used with one or multiple energy performance metrics. This standard applies to only the energy component of a rating program. PURPOSE The purpose of this document is to provide a standardized approach and methodology for determining and expressing building energy performance in a rating program. The purpose of this document is to standardize the content of the label associated with the energy component of a rating program and to establish minimum requirements for rating program documentation.