California Code
ARTICLE 2 - Policy Provisions
Section 11661.5.

11661.5. An insurer shall not insure an employer against his liability for additional compensation arising out of injuries to illegally employed persons under 16 years of age, as provided for by Part 4 (commencing with Section 1171) of Division 2 of the Labor Code.

(Amended by Stats. 1967, Ch. 689.)