2013/782/EU: Commission Implementing Decision of 18 December 2013 amending Decision 2002/757/EC as regards the phytosanitary certificate requirement in respect of the harmful organism Phytophthora ramorum Werres, De Cock & Man in ’t Veld sp. nov. for bark-free sawn wood of Acer macrophyllum Pursh and Quercus spp. L. originating in the United States of America (notified under document C(2013) 9181)