— stating general principles for the use of EN 15804 by CEN Technical Committees for construction products ( [no rendering defined for element: abbrev ] Product TC's) in order to ensure consistency among the complementary [no rendering defined for element: abbrev ] PCR produced by [no rendering defined for element: abbrev ] Product TC's;

— addressing the questions raised by [no rendering defined for element: abbrev ] Product TC's, manufacturers or their sub-contractors who provide [no rendering defined for element: abbrev ] LCA studies underlying an Environmental Product Declaration ( [no rendering defined for element: abbrev ] EPD) and by [no rendering defined for element: abbrev ] EPD programme operators who include [no rendering defined for element: abbrev ] c-PCR of specific subcategories in their [no rendering defined for element: abbrev ] PCR registry.