Under 9 U.S.C. 402(a), a pre-dispute arbitration agreement is not enforceable to require arbitration (or waive a class action) on a claim for sexual harassment or assault under state or federal law. Section 402 became effective on March 3, 2022 and applies to all disputes which arise after that date. This decision holds that a “dispute” does not arise when the claim accrues but only when the plaintiff first makes a demand on the defendant–as in this case by filing a DFEH complaint. Since that complaint was filed after March 3, 2022, section 402 applied and invalidated the arbitration agreement since plaintiff alleged sexual harassment claims.