Mayor v. WCAB: California Supreme Court Enforces the Reconsideration Deadline

Read the source decision.

A petition for reconsideration is one of the most important procedural filings in a California workers’ compensation case. Mayor v. Workers’ Compensation Appeals Board asked whether the Appeals Board could extend its own statutory deadline when an administrative irregularity prevented the Board from learning about a timely petition.

The California Supreme Court held that the deadline in the former version of Labor Code section 5909 was mandatory. Although the deadline did not eliminate the Board’s fundamental jurisdiction, the Board lacked authority to equitably toll its own time to act. The Court affirmed a writ directing the Board to rescind its late order.

What happened in Mayor?

Joseph Mayor sustained an industrial injury while working for Ross Valley Sanitation District. A workers’ compensation judge found him totally and permanently disabled. The employer timely petitioned for reconsideration, and Mayor timely answered.

The petition did not reach the Appeals Board within the then-applicable 60-day period. The Board later said that an administrative irregularity delayed notice. It granted reconsideration 144 days after filing and relied on Shipley to treat the period as running from the Board’s receipt of notice.

The Court of Appeal issued a writ directing the Board to rescind that order. The California Supreme Court accepted review to decide whether equitable tolling could save the Board’s late action.

What did the Supreme Court hold?

The Supreme Court distinguished fundamental jurisdiction from action in excess of authority. The WCAB remained the tribunal empowered to hear workers’ compensation matters, but the former statute imposed a mandatory limit on how it exercised that power. A petition not acted upon within the statutory period was deemed denied.

The Court rejected automatic equitable tolling based on the Board’s delayed receipt. Tolling ordinarily protects a litigant who pursues a claim diligently; it is not a device for an adjudicative body to enlarge its own decision deadline. The Court left open the possibility that a narrow due-process problem could require a different analysis, but no party established such a violation in Mayor.

The Court also expressly declined to decide whether a bare “grant-for-study” order is a proper merits disposition within the statutory period. That separate question should not be treated as resolved by Mayor.

What changed in Labor Code section 5909?

The case applied the former statute, which measured 60 days from filing. The Legislature later changed the trigger to the date the trial judge transmits the case to the Appeals Board and provides notice. Legislation effective in July 2026 retained that transmission-based trigger.

That amendment matters. Mayor establishes how the former filing-based deadline operated and rejects self-tolling, but current cases must be evaluated under the current statutory text, the transmission record, and the notices actually served.

Practical lessons for California claims

• Keep file-stamped copies of every petition and answer.
• Track the judge’s report, transmission date, and proof of notice.
• Do not assume that silence leaves reconsideration pending indefinitely.
• Calendar judicial-review deadlines based on the governing statute and actual procedural posture.
• Obtain advice promptly because a missed writ deadline can foreclose review.

Mayor is a procedural decision. It did not revisit the evidence supporting Mayor’s disability award or decide the merits of every delayed reconsideration petition.