55. Yn rheoliad 21(5) o Reoliadau Trethi Tirlenwi 1996(1), ar ôl is-baragraff (a) mewnosoder—
“(aa)the Natural Resources Body for Wales;”.
O.S. 1996/1527 fel y'i diwygiwyd gan O.S. 1997/1431, O.S. 1998/61, O.S. 1999/3270, O.S. 2002/1, O.S. 2003/605, O.S. 2003/2096, O.S. 2003/2313, O.S. 2004/769, O.S. 2005/759, O.S. 2006/1054, O.S. 2007/965, 2007/1898, O.S. 2007/3538, O.S. 2008/770, O.S. 2008/1482, O.S. 2008/2693, O.S. 2009/1890, O.S. 2009/1930, O.S. 2010/924, O.S. 2010/675, O.S. 2010/2437, O.S. 2011/894, O.S. 2012/885.