xmlns:atom="http://www.w3.org/2005/Atom"
27. Mae Rheoliadau Gwastraff Peryglus (Cymru) 2005(1) wedi eu diwygio fel a ganlyn.
O.S. 2005/1806 (Cy. 138) fel y'i diwygiwyd gan O.S. 2006/937, O.S. 2007/3538, O.S. 2009/2861 (Cy. 250), O.S. 2010/675, 2O.S. 010/1820 (Cy. 177), O.S. 2011/556 (C. 19), O.S. 2011/971 (Cy. 141), O.S. 2011/2043.