Cal. LAB § 5405

The period within which proceedings may be commenced for the collection of the benefits provided by Article 2 (commencing with Section 4600) or Article 3 (commencing with Section 4650), or both, of Chapter 2 of Part 2 is one year from any of the following: (a) The date of injury. (b) The expiration of any period covered by payment under Article 3 (commencing with Section 4650) of Chapter 2 of Part 2. (c) The last date on which any benefits provided for in Article 2 (commencing with Section 4600) of Chapter 2 of Part 2 were furnished.