Code of Federal Regulations Title 20. Employees' Benefits § 20.404.363 When is a stepchild dependent?

(a) When you applied;

(b) When the insured died;  or

(c) If the insured had a period of disability that lasted until his or her death or entitlement to disability or old-age benefits, at the beginning of the period of disability or at the time the insured became entitled to benefits.