20 CFR § 725.221
Determination of dependency; child
February 18, 2021
For the purposes of determining whether a child was dependent upon a deceased miner, the provisions of §725.209 shall be applicable, except that for purposes of determining the eligibility of a child who is under a disability as defined in section 223(d) of the Social Security Act, such disability must have begun before the child attained age 22, or in the case of a student, before the child ceased to be a student.