Cal. VEH § 13363

(a) The department may, in its discretion, except as provided in Chapter 6 (commencing with Section 15000) of Division 6, of this code, suspend or revoke the privilege of any resident or nonresident to drive a motor vehicle in this State upon receiving notice of the conviction of the person in a state, territory, or possession of the United States, the District of Columbia, the Commonwealth of Puerto Rico, or the Dominion of Canada of an offense therein which, if committed in this State, would be grounds for the suspension or revocation of the privilege to operate a motor vehicle.

(b) Whenever any state, territory, or possession of the United States, the District of Columbia, the Commonwealth of Puerto Rico, or the Dominion of Canada reports the conviction of a violation in such place by a person licensed in this State, the department shall not give effect to such report pursuant to subdivision (a) of this section or Section 15023 unless the department is satisfied that the law of such other place pertaining to the conviction is substantially the same as the law of this State pertaining to such conviction and that the description of the violation from which the conviction arose, is sufficient and that the interpretation and enforcement of such law are substantially the same in such other place as they are in this State.