Commencing January 1, 1979, and thereafter on the first day of January for each of the next two years, the liability period for occupational disease or cumulative injury shall be decreased by one year so that liability is limited in the following manner:
For claims filed or asserted on or after: The period shall be:
January 1, 1979 ..................... three years January 1, 1980 ..................... two years January 1, 1981 and thereafter ...... one year In the event that none of the employers during the above referenced periods of occupational disease or cumulative injury are insured for workers' compensation coverage or an approved alternative thereof, liability shall be imposed upon the last year of employment exposing the employee to the hazards of the occupational disease or cumulative injury for which an employer is insured for workers' compensation coverage or an approved alternative thereof.
Any employer held liable for workers' compensation benefits as a result of another employer's failure to secure the payment of compensation as required by this division shall be entitled to reimbursement from the employers who were unlawfully uninsured during the last year of the employee's employment, and shall be subrogated to the rights granted to the employee against the unlawfully uninsured employers under the provisions of Article 1 (commencing with Section 3700) of Chapter 4 of Part 1 of Division 4.
If, based upon all the evidence presented, the appeals board or workers' compensation judge finds the existence of cumulative injury or occupational disease, liability for the cumulative injury or occupational disease shall not be apportioned to prior or subsequent years; however, in determining the liability, evidence of disability due to specific injury, disability due to nonindustrial causes, or disability previously compensated for by way of a findings and award or order approving compromise and release, or a voluntary payment of disability, may be admissible for purposes of apportionment.
Only one continuance shall be allowed for the purpose of joining additional parties. Subsequent to the first hearing the appeals board shall join as a party defendant any additional employer when it appears that the employer is a proper party, but the liability of the employer shall not be determined until supplemental proceedings are instituted.
On supplemental proceedings, however, the right of the employer to full and complete examination or cross-examination shall not be restricted.
Ca. Lab. Code § 5500.5