Again, a TrumpeRINO who knows law better than a judge.  

Contracts are enforceable, including agreement to refer to arbitration. Either side can take it to court, but as the judge ruled:

"In March, Collin County District Judge Andrea Thompson ordered a Muslim woman seeking a divorce from her husband to undergo arbitration not through regular channels but through an Islamic court, also known as a Fiqh Panel — a move that the woman's lawyers argue is an obvious and unconscionable affront to her constitutional rights."

One pays attorneys to offer opinions that may or may not be upheld in court. The judge ruled that the contract be honored, referred the case to arbitration. After which either of both parties may appeal to a court.

It's contractual, even though the referral is to an Islamic court, the issue was agreed by a pre-nuptial agreement.