A claimant is any individual whose asserted rights under titles II, XVI, or XVIII of the Act
or title IV of the Federal Mine Safety and Health Act (referred to hereinafter as
the Black Lung Benefits Act) are, or may be, affected by an SSA determination or decision.
As used throughout this subchapter, the term includes a beneficiary. References to
the “claimant” as a party include any person authorized to act on the claimant's behalf, e.g., parent,
legal guardian, or representative payee.