20 CFR § 725.211 - Time of determination of relationship and dependency of spouse or child for purposes of augmentation of benefits.

With respect to the spouse or child of a miner entitled to benefits, and with respect to the child of a surviving spouse entitled to benefits, the determination as to whether an individual purporting to be a spouse or child is related to or dependent upon such miner or surviving spouse shall be based on the facts and circumstances present in each case, at the appropriate time.

Conditions and Duration of Entitlement: Miner's Survivors