A farm company with an insurance policy containing an arbitration clause tried to force a non-signatory (someone who didn't sign the contract) into arbitration. Texas's highest court said no—you can't force someone into arbitration unless there's clear proof both parties agreed to it. The court also ruled that judges, not arbitrators, decide whether non-signatories must arbitrate. This matters to subcontractors because it limits when you can be forced into arbitration with parties you never contracted with.
You cannot force a non-signatory into arbitration just because an arbitration clause exists in your contract—the other party must have clearly agreed to arbitrate with outsiders
Simply using AAA (American Arbitration Association) rules in your contract does not automatically bind non-signatories to arbitration