Section 5400 Of Chapter 2. Limitations Of Proceedings From California Labor Code >> Division 4. >> Part 4. >> Chapter 2.

. Except as provided by sections 5402 and 5403, no claim to recover compensation under this division shall be maintained unless within thirty days after the occurrence of the injury which is claimed to have caused the disability or death, there is served upon the employer notice in writing, signed by the person injured or someone in his behalf, or in case of the death of the person injured, by a dependent or someone in the dependent's behalf.