California Code, Code of Civil Procedure - CCP § 1297.173

(a) Unless otherwise agreed by the parties, a party may, without notice to any other party, make a request for an interim measure together with an application for a preliminary order directing a party not to frustrate the purpose of the interim measure requested.

(b) The arbitral tribunal may grant a preliminary order provided that it considers that prior disclosure of the request for the interim measure to the party against whom it is directed risks frustrating the purpose of the measure.

(c) The conditions defined under Section 1297.172 apply to any preliminary order, provided that the harm to be assessed under paragraph (1) of subdivision (a) of Section 1297.172 is the harm likely to result from the order being granted or not.