Book excerpt: The field of EU public procurement law is one of the few fields of EU law where a very developed enforcement regime is in place. Furthermore, recent legislation and practice from the European Court of Justice ensures an even higher level of effectiveness. This book focuses on the national enforcement of the EU public procurement rules (as enforcement mainly takes place at national level) and the recent changes introduced with Remedies Directive 2007/66 which are important but also unclear on substantial points. The new remedy ineffectiveness of concluded contracts will be given particular attention. Enforcement at the supranational level is also considered, with emphasis on the possible interaction between national and supranational enforcement of the rules.