Section 31843 Of Article 15.5. Survivors’ Allowances From California Government Code >> Division 4. >> Title 3. >> Part 3. >> Chapter 3. >> Article 15.5.

. As used in this article "child" means a member's child who is dependent upon such member at the time of his death and while such child is unmarried and:
  (a) Under 18 years of age, or
  (b) Whether under or over 18 years of age, totally disabled and such disability occurred prior to such child attaining age 18 years.