MO SB412

Transfers initial arbitrability decisions from courts to arbitrators for employer/at-will employee arbitration agreements, including whether parties agreed to arbitrate and whether specific claims are covered

Establishes that employer-employee arbitration agreements are valid and enforceable when: both parties must arbitrate covered disputes, the employer provides written notice, the employee accepts in writing or continues employment, and modifications don't apply to previously accrued claims

Requires courts to automatically stay pending actions and order arbitration when a party demonstrates an employer-employee arbitration agreement exists, without the standard judicial review procedures

Removes language that previously excluded new home warranty contracts and reinsurance contracts from the "contracts of adhesion" exception to arbitration enforceability

Amends sections 435.350, 435.355, and 435.440 RSMo to create separate procedural tracks for employer-employee arbitration agreements versus other arbitration agreements