2 Modification to the Scope Add the following paragraph after the 1st paragraph: This European Standard includes AAC masonry units with an incorporated insulation not exposed to fire, and masonry units of an overall rectangular parallelepiped shape, especially shaped and accessory units. AAC masonry units may consist of layers of different densities where not all of the layers are loadbearing. . Replace the 2nd and 3rd paragraphs with the following: It provides for the assessment and verification of constancy of performance (AVCP) of the product to this European Standard. The marking requirement for products covered by this European Standard is included. .