There are fears that the proposed ban is simply an attempt to avoid Sharia law and six other states have enacted similar bans. Oklahoma passed such a ban in 2010 which expressly referred to Sharia law but it was struck down this year by a federal appeals court for being discriminatory. Only 16 states have not considered such measures. A report last year by the Brennan Centre warned that such bans could have unintended consequences such as disrupting marital prenuptial agreements or invalidating court decisions in other states. Source: Governing.com