Workers’ Compensation · Primary-source case analysis

Mayor: The WCAB Could Not Equitably Toll Its Own Reconsideration Deadline

By Aneeta Mishra and Timothy Chan

Published September 17, 2026 · Updated October 18, 2026

Decision: Mayor v. WCAB, No. S287261 (Cal. Aug. 24, 2026).

The employer filed on time; the WCAB did not act on time. That distinction drove Mayor. After Joseph Mayor received an award of permanent total disability, Ross Valley Sanitation District timely sought reconsideration, but the Board waited 144 days before granting it. The California Supreme Court held that the Board could not use equitable tolling to extend its own statutory decision period because its internal processing failed.

The decision answers what the agency could do after the former deadline, not every possible question about a party’s due-process rights or a grant-for-study order. Those limits matter when comparing older reconsideration cases or choosing how to challenge late Board action.

Former section 5909 set a mandatory deadline

Ross Valley filed its petition on March 23, 2023. The statute then in force deemed the petition denied unless the Board acted within 60 days of filing. The trial judge did not take the action required by the applicable report-and-recommendation procedures, and the Board said it did not receive notice of the petition until after the statutory period. The employer made one recorded status inquiry, 74 days after filing. Mayor, slip opinion, pages 2–4.

The deadline was mandatory, but it did not strip the WCAB of fundamental jurisdiction—its basic authority over workers’ compensation cases. The Board nevertheless acted beyond the limits governing this proceeding. In plain terms, having authority over the kind of case did not give it permission to ignore the rule about when to act. Mayor, slip opinion, pages 11–19.

The Board could not toll its own time to act

Equitable tolling ordinarily excuses a litigant from a filing deadline in carefully defined circumstances. Here, no deadline applicable to Ross Valley needed to be extended: It had filed on time. The Board was extending the deadline imposed on itself, an adjudicative body rather than a litigant. Its lack of timely notice did not authorize that practice. Mayor, slip opinion, pages 21–24.

This rejects reliance on City of Salinas as permission for the Board to equitably toll its own period. The Supreme Court identified that case as one in which review had been granted and action deferred pending Mayor. It did not expressly disapprove City of Salinas by name or announce its later case-specific disposition in this opinion. The contrary self-tolling approach cannot replace the Supreme Court’s rule. Mayor, slip opinion, pages 6, 21–27.

The Court treated Shipley differently from a routine processing delay. That older case involved a misplaced file, repeated inquiries and agency reassurances. Mayor left open whether particular facts could establish a due-process violation, but required the affected party—not the Board—to assert that right. Ross Valley had not done so. The Court also disapproved Shipley to the extent it suggested every timely petitioner necessarily has a due-process right to Board review after the deadline. A reserved constitutional question is not an automatic extension. Mayor, slip opinion, pages 24–29 & note 7.

A writ of mandate was available

Mayor challenged the Board’s authority to issue the late order; he was not asking the court to reweigh the disability evidence. The Supreme Court upheld traditional mandate directing rescission of the untimely reconsideration order. Requiring him to wait for a later final merits decision could leave the statutory protection unenforceable for months or years. Mayor, slip opinion, pages 30–32.

The Court noted that prohibition would have been the more proper writ, while affirming the mandate relief actually granted. It did not make mandate a universal substitute for a timely petition for writ of review. A challenge to the Board’s authority to act and a challenge to the merits of a compensation decision ask different questions and require prompt procedural review. Mayor, slip opinion, pages 31–33 & note 9.

Another issue remained expressly undecided: Whether a bare grant-for-study order is proper or whether section 5908.5 requires a final merits decision within the statutory period. Mayor did not resolve that separate practice merely by rejecting self-tolling. Mayor, slip opinion, page 12, note 4.

The governing statute has since changed

The case construed the former filing-triggered version of section 5909. The 2024 amendment instead used the date the trial judge transmits the case to the Board and required notice; service of the accompanying report constitutes notice. The Legislature then removed the planned sunset through legislation effective July 13, 2026, retaining the transmission trigger. Mayor, slip opinion, page 5 & note 3, page 33.

For a present file, preserve the petition’s filing date, the transmission record, the report and service evidence, and the actual Board order. Do not substitute the date someone first noticed the petition for the statutory trigger. Check the version of the law governing the relevant events rather than counting from the 2023 petition in this case. The Board’s decision period and a party’s time to seek judicial review remain different calculations.

Key takeaways

• Identify the governing statute before choosing filing or transmission as the trigger.
• Keep filing, transmission, report, service, status inquiries and agency responses as separate dated events.
• Do not confuse a reserved party-specific due-process question with agency power to extend its own deadline.
• Identify whether the challenge concerns authority to act or the merits; do not treat one writ as a substitute for all others.

This case analysis provides general information, not legal advice. It does not preserve a claim or extend a filing deadline; the actual record and governing law require individual review.