[ScaniaBoy]

some way will have to be found so that not a single EU nation votes on approving membership

EUcrat: And this will be a problem because..?

(Also, I'm not sure you are right. A new accession is not the same as a new Treaty. I cannot remember Denmark or Ireland having referenda on Bulgarian and Romanian entry.)

[AntiGuv]

The Treaty of Nice permits up to 27 members. That covers Bulgaria & Romania.

[ScaniaBoy]

...on the other hand I seem to remember that Chirac gave the French a promise on a referendum on Turkey (but maybe he took it back when they snubbed him on the constitution.)