What did the Cal. Sup. Court mean in Gikas v. Zolin by citing expressio unius est exclusio alterius?
In Gikas v. Zolin, 6 Cal. 4th 841, 852 (1993), the California Supreme Court used expressio unius est exclusio alterius to mean that when the Legislature expressly specified one preclusive consequence of a criminal disposition, the court would not infer additional preclusive consequences not stated in the statute.[1] In other words, the statute’s mention of preclusion upon an acquittal implied that other dispositions or issue-preclusion effects were excluded.[1]
What the court was doing
The court was construing former Veh. Code, § 13353.2, subd. (e) and emphasized:
“Because the Legislature has specified exactly what preclusive effect the criminal proceeding has on the administrative, we may not grant greater preclusive effect merely because we may find it to be desirable. Expressio unius est exclusio alterius. The expression of some things in a statute necessarily means the exclusion of other things not expressed.”[1]
The court’s point was that the statute affirmatively gave preclusive effect only to an acquittal in the specific manner described, and therefore the court would not extend that effect to a criminal court’s suppression ruling or dismissal based on unlawful arrest.[1]
Practical meaning in Gikas
| Statutory text | Court’s inference |
|---|---|
| Statute expressly says an acquittal requires reinstatement | The Legislature intentionally limited preclusion to that circumstance |
| Statute does not say a suppression ruling or dismissal bars DMV action | The court would not read those consequences into the statute |
| Statute specifies that DMV determinations have no estoppel effect on later criminal cases | The court treated the statute as a deliberate, one-way allocation of preclusion rules |
So, the canon was used to support a narrow reading of the statute: the Legislature said what it meant, and the court would not add more.[1]
Important nuance
The majority in Gikas v. Zolin, 6 Cal. 4th 841 (1993) did not use the canon to say that all issue preclusion was categorically unavailable in DMV proceedings. Rather, it used the canon to conclude that the statute itself displaced broader common-law preclusion arguments and limited the effect of criminal proceedings to the specific “acquittal” situation the Legislature chose to mention.[1]