It is currently working on the creation of specifics European standard regulations for bamboo flooring and other species that are not considered as natural wood. It could be finished in 2017.
Many providers of this product, as Grupo GUBIA, have benefited in the past _ doing a broad interpretation of the legislation_ to EN 14342, which related only to natural wood flooring but not specifically excluding other species such as bamboo, for give to their products CE marking. This standard was revised in 2013, excluding these vegetal materials. For this reason, and until the new specific regulations for them not to be published, you can not speak or demand a CE label to bamboo floorings or to those species that are not natural wood