Those 35 Measures.

Writing for the Guardian’s Comment is Free, Open Europe Research Director Stephen Booth argues, “The coalition has missed a chance to debate the fundamental issue…once the UK opts back in to these 35 measures, EU judges rather than UK judges will have the last word on how they are interpreted… amending EU law in the wake of an EU judgment that results in something our elected representatives did not intend is extremely difficult, as it can only be achieved through complex EU negotiations. Thus, the democratic link to citizens is broken.” Stephen also appeared on BBC Radio 5 Live discussing the opt-out.
Guardian: Booth Open Europe press release FT Independent IHT Conservative Home: Goodman Telegraph: Rees-Mogg EUobserver Conservative Home: Leadsom