Religious laws in the US

"In the United States both secular and religious arbitration are firmly established, operating under a Federal Arbitration Act that gives robust standing to the procedure but also allows the parties to counter-appeal to ordinary courts on certain grounds (though America’s church-state separation stops courts hearing arguments about doctrine). Christian and Jewish arbitration is well-organised. The Muslim variety is lower-key and less formal, but so far not (barring outbursts from tea-partistas like Ms Angle) especially controversial."