If a controversy referable to arbitration under an alleged agreement is involved in an action or proceeding pending in a superior court, a petition for an order to arbitrate shall be filed in such action or proceeding.
Code Civ. Proc. § 1292.4 — under California Code Civ. Proc..
Code Civ. Proc. § 1292.4
If a controversy referable to arbitration under an alleged agreement is involved in an action or proceeding pending in a superior court, a petition for an order to arbitrate shall be filed in such action or proceeding.