Cal. CCP § 1717

(a) For the purpose of paragraph (2) of subdivision (b) of Section 1716, a foreign court lacks personal jurisdiction over a defendant if either of the following conditions is met:

(1) The foreign court lacks a basis for exercising personal jurisdiction that would be sufficient according to the standards governing personal jurisdiction in this state.

(2) The foreign court lacks personal jurisdiction under its own law.

(b) A foreign-country judgment shall not be refused recognition for lack of personal jurisdiction under paragraph (1) of subdivision (a) if any of the following apply:

(1) The defendant was served with process personally in the foreign country.

(2) The defendant voluntarily appeared in the proceeding, other than for the purpose of protecting property seized or threatened with seizure in the proceeding or of contesting the jurisdiction of the court over the defendant.

(3) The defendant, before the commencement of the proceeding, had agreed to submit to the jurisdiction of the foreign court with respect to the subject matter involved.

(4) The defendant was domiciled in the foreign country when the proceeding was instituted or was a corporation or other form of business organization that had its principal place of business in, or was organized under the laws of, the foreign country.

(5) The defendant had a business office in the foreign country and the proceeding in the foreign court involved a cause of action or claim for relief arising out of business done by the defendant through that office in the foreign country.

(6) The defendant operated a motor vehicle or airplane in the foreign country and the proceeding involved a cause of action or claim for relief arising out of that operation.

(c) The list of bases for personal jurisdiction in subdivision (b) is not exclusive. The courts of this state may recognize bases of personal jurisdiction other than those listed in subdivision (b) as sufficient for the purposes of paragraph (1) of subdivision (a).