On 11 December 2007, the Council and European Parliament published the revised “Remedies Directive” (Directive 2007/66/EC), which will introduce new national review procedures for breaches of procurement law. There is a requirement that contracting authorities comply with a minimum 10 days "standstill" obligation to give bidders an opportunity to challenge decisions. The new provisions are likely to require significant changes to current law. National courts will be able to declare contracts ineffective and require re-tendering. Where there are overriding reasons in the general interest why the contract needs to remain in force, the national courts can apply alternative penalties provided these are proportionate, effective and dissuasive. The Directive must be implemented in national law by 20 December 2009.