They were also reviewing proposals approved by the executive European Commission on Wednesday that involve harmonising police and judicial action, long considered core areas of national sovereignty.
Supporters of Proposition 8 say the court should respect the verdict of California voters who approved the ban in 2008 and let the fast-changing politics of gay marriage evolve on their own, through ballot measures and legislative action, not judicial decrees.
But Cornell University law professor Josh Chafetz, a legislative expert and former federal clerk, says any judicial proceedings relating to the civil action will likely take years and outlast any political interest in the case.
The North Yorkshire Waste Action Group is also seeking its own judicial review over the county council's decision to grant planning approval in 2012.
BBC: Council 'arrogance' over Allerton Park incinerator plan
The Surrey Libraries Action Movement (Slam) is seeking a judicial review of the council's decision-making process.
The North Yorkshire Waste Action Group (NYWAG) is seeking a judicial review of the decision to grant planning consent for the plant at Allerton Park.
Lee Godfrey, from Surrey Libraries Action Movement (Slam), which brought the judicial review this year, said the decision was disappointing.
BBC: Surrey County Council's volunteer library plan to proceed
Declaring class-action status for the lawsuit raises the financial and judicial stakes considerably, since more individual plaintiffs can now join, creating greater potential liability for the company being sued.
CNN: Justices accept appeal over Wal-Mart gender pay lawsuit
Mr Susilo, promising decisive action against corruption and the chaos in Indonesia's judicial system, has built himself an image of calm, competence and honesty which, say pollsters, has won him support from young and old, rich and poor, and city and country folk.
Graham Stringer, Labour MP for Manchester Blackley, declared the decision "outrageous" and said he would support any legal action by Manchester City Council if it wanted to seek a judicial review.
But that deadline has been extended indefinitely after Mr Scheckter started legal action, which has so far included a failed bid for a judicial review.
Republicans say they will question Sotomayor about her views on affirmative action, gun rights and whether her Latina heritage would unfairly affect her judicial rulings.
Five judicial reviews were brought by four protest groups, including 18 councils, campaign group High Speed 2 Action Alliance (HS2AA), which represents more than 70 affiliated groups and residents' associations, and a golf club.
BBC: HS2 ruling 'a victory' despite unlawful compensation move
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