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Add the following paragraph to the end of item 3: "The vintage of any REC purchased to meet the Green Power credit requirements must be valid according to the Green-e vintage requirements as written on the date of purchase. Project teams must affirm in writing that the purchased RECs are being claimed for use on this particular LEED Project only."

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Replace the second to last sentence to read, "Finally, measure the angle between this fixture line of sight and the perpendicular with the vertex located at the fixture edge."

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Revise the text for "Building footprint" to be "Building footprint is the area on a project site used by the building structure, defined by the perimeter of the building plan. Parking lots, parking garages, landscapes, and other nonbuilding facilities are not included in the building footprint."

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In alphabetical order, add the term "An appurtenance is any built-in, nonstructural portion of a roof system, such as skylights, ventilators, mechanical equipment, partitions, and solar energy panels."