Argument: Lisbon Treaty uses language fitting for amending previous treaties
"Treaty of Lisbon. Questions and Answers". Europea.eu - Why is the Treaty of Lisbon not easier to read?
Changes to the EU's Treaties have always come about through amendments to previous Treaties: this was true of the Single European Act, as well as the Treaties of Maastricht, Amsterdam and Nice. The Treaty of Lisbon uses the same technique. The Union's two main Treaties will be renamed the Treaty on European Union and the Treaty on the Functioning of the European Union. The two Treaties will have the same rank.
A consolidated text of the two core Treaties, integrating the modifications which the Treaty of Lisbon lists in its articles, is also available.