Where this sits
- Chapter 4.5.
- Division of Workers' Compensation
- Subchapter 2. Workers' Compensation Appeals Board--Rules and Practice Procedure
- Article 9. Filing and Service of Documents
The regulation, as printed
Authority and history
Note: Authority cited: Sections 133, 5307, 5309 and 5708, Labor Code. Reference: Section 5316, Labor Code; Sections 6700, 6701 and 6707, Government Code; and Sections 10, 12, 12a, 12b, 13 and 135, Code of Civil Procedure.
1. Amendment of section and Note filed 12-19-2002; operative 1-1-2003. Submitted to OAL for printing only pursuant to Government Code section 11351 (Register 2002, No. 51). 2. Amendment of article 9 heading, repealer of former section 10600 and renumbering of former section 10508 to section 10600, including amendment of section heading and section, filed 12-17-2019; operative 1-1-2020. Submitted to OAL for printing only pursuant to Government Code section 11351 (Register 2019, No. 51).
What panels did with this rule
Released decisions that named § 10600, with the passage each turned on. A panel decision persuades; it does not bind.
- ADJ2419734 · 2026-05-07 · San Francisco District Office8 CCR § 10600
Determinative passage · p.4This time limit is jurisdictional, and, therefore, the Appeals Board has no authority to consider or act upon an untimely petition for reconsideration. (Maranian v. Workers' Comp. Appeals Bd. (2000) 81 Cal.App.4th 1068, 1076 [65 Cal.Comp.Cases 650, 656]; Rymer v. Hagler (1989) 211 Cal.App.3d 1171, 1182; Scott v. Workers' Comp. Appeals Bd. (1981) 122 Cal.App.3d 979, 984 [46 Cal.Comp.Cases 1008, 1011]; U.S. Pipe & Foundry Co. v. Industrial Acc. Com. (Hinojoza) (1962) 201 Cal.App.2d 545, 549 [27 Cal.Comp.Cases 73, 75§ 76].)
The Board found the petition untimely and dismissed it for lack of jurisdiction.
Official decision · page 4 → - ADJ1545786 · 2026-03-30 · Santa Rosa District Office8 CCR § 10600
Determinative passage · p.33 WCAB Rule 10600(b) (Cal. Code Regs., tit. 8, § 10600(b)) states that: Unless otherwise provided by law, if the last day for exercising or performing any right or duty to act or respond falls on a weekend, or on a holiday for which the offices of the Workers' Compensation Appeals Board are closed, the act or response may be performed or exercised upon the next business day.
The deadline for the Appeals Board to act on the petition was extended to the next business day, March 30, 2026, when the decision was issued.
Official decision · page 3 → - ADJ3206096 · 2026-03-13 · Marina del Rey District Office8 CCR § 10600
Determinative passage · p.2II. Next, we address the timeliness of applicant's petition. The Proof of Service for the November 10, 2025 Findings of Fact indicates defective service on applicant by including the wrong state for applicant's Las Vegas address (California ("CA") rather than Nevada ("NV"). Where the service of a decision is defective, the statutory time period for filing a petition for reconsideration does not begin to run until the decision is actually received. (See Hartford Acc. & Indem. Co. v. Worker's Comp. Appeals Bd. (Phillips) (1978) 86 Cal.App.3d 1, 3 [43
The petition was filed on December 18, 2025, within 30 days of service on November 20, 2025, and the Appeals Board acted on March 13, 2026, within 60 days of transmission on January 12, 2026.
Official decision · page 2 → - ADJ15096065 · 2026-03-02 · Van Nuys District Office8 CCR § 10600
Determinative passage · p.22 WCAB Rule 10600(b) (Cal. Code Regs., tit. 8, § 10600(b)) states that: Unless otherwise provided by law, if the last day for exercising or performing any right or duty to act or respond falls on a weekend, or on a holiday for which the offices of the Workers' Compensation Appeals Board are closed, the act or response may be performed or exercised upon the next business day.
The decision was issued on the next business day after the 60-day period ended on a Saturday, making the action timely.
Official decision · page 2 → - ADJ14247731 · 2026-02-02 · Anaheim District Office8 CCR § 10600
Determinative passage · p.3last day for filing falls on a weekend or holiday. (Cal. Code Regs., tit. 8, § 10600.) To be timely, however, a petition for reconsideration must be filed with (i.e., received by) the WCAB within the time allowed; proof that the petition was mailed (posted) within that period is insufficient. (Cal. Code Regs., tit. 8, § 10940(a), 10615(b).) In addition, a Petition for Reconsideration filed via EAMS3 is deemed filed on the date received by the Appeals Board if it is received prior to 5:00 p.m. on a court day. (Cal. Code Regs., tit. 8, § 10615(b).) Any Petition for Reconsideration "received after 5:00 p.m. of a court day shall be deemed filed as of the next court day." (Cal. Code Regs., tit. 8, § 10615(b).)
Applied to determine the petition was untimely and must be dismissed.
Official decision · page 3 → - ADJ10305799 · 2025-10-20 · Sacramento District Office8 CCR § 10600
Determinative passage · p.2Here, according to Events, the case was transmitted to the Appeals Board on August 20, 2025, and 60 days from the date of transmission is Sunday, October 19, 2025, which by operation of law means this decision is due by Monday, October 20, 2025. (Cal. Code Regs., tit. 8, § 10600.). This decision is issued by or on October 20, 2025, so that we have timely acted on the Petition as required by section 5909(a).
The 60th day was Sunday, October 19, 2025, so the deadline was Monday, October 20, 2025.
Official decision · page 2 → - ADJ18890787 · 2025-08-11 · San Diego District Office8 CCR § 10600
Determinative passage · p.2There are 25 days allowed within which to file a petition for reconsideration from a "final" decision that has been served by mail upon an address in California. (Lab. Code, § 5900(a), 5903; Cal. Code Regs., tit. 8, § 10605(a)(1).) This time limit is extended to the next business day if the last day for filing falls on a weekend or holiday. (Cal. Code Regs., tit. 8, § 10600.) To be timely, however, a petition for reconsideration must be filed with (i.e., received by) the WCAB within the time allowed; proof that the petition was mailed (posted) within that period is insufficient. (Cal. Code Regs., tit. 8, § 10940(a), 10615(b).)
The petition filed on June 12, 2025 was beyond the 25-day limit from the August 2, 2024 order, making it untimely and subject to dismissal.
Official decision · page 2 → - ADJ771417 · 2025-07-25 · San Diego District Office8 CCR § 10600
Determinative passage · p.2II. There are 25 days allowed within which to file a petition for reconsideration from a "final" decision that has been served by mail upon an address in California. (Lab. Code, § 5900(a), 5903; Cal. Code Regs., tit. 8, § 10605(a)(1).) This time limit is extended to the next business day if the last day for filing falls on a weekend or holiday. (Cal. Code Regs., tit. 8, § 10600.) To be timely, however, a petition for reconsideration must be filed with (i.e., received by) the WCAB within the time allowed; proof that the petition was mailed (posted) within that period is insufficient. (Cal. Code Regs., tit. 8, § 10940(a), 10615(b).) This time limit is jurisdictional and, therefore, the Appeals Board has no authority to consider or act upon an untimely petition for reconsideration. (Maranian v. Workers' Comp. Appeals Bd. (2000) 81 Cal.App.4th 1068, 1076 [65 Cal.Comp.Cases 650]; Rymer v. Hagler (1989)
The petition was filed after the 25-day period and the Appeals Board dismissed it as untimely.
Official decision · page 2 →
Rules beside this one
Article 9. Filing and Service of Documents — regulations rarely stand alone, and the answer is often two sections away.
- § 10601Copies of Reports and Records. [Repealed].1 decisions
- § 10602Formal Permanent Disability Rating Determinations. [Renumbered]1 decisions
- § 10603Oversized Exhibits, Diagnostic Imaging, Physical Exhibits, and Exhibits on Media. [Renumbered]
- § 10604Certified Copies. [Repealed]
- § 10605Time Within Which to Act When a Document is Served by Mail, Fax or E-Mail.134 decisions
- § 10606Physicians' Reports as Evidence. [Renumbered]