Changes made by Directive 2003/55/EC of the European Parliament and of the Council of 26 June 2003 concerning common rules for the internal market in natural gas and repealing Directive 98/30/EC
EU Directive 2003/55
The legislation Directive 2003/55/EC of the European Parliament and of the Council of 26 June 2003 concerning common rules for the internal market in natural gas and repealing Directive 98/30/EC changes, newest first. Choose one to see each change.
From legislation.gov.uk's record of changes, the official one: see it there.