20 C.F.R. § 266.12
All matters and actions in connection with an annuity submitted or taken by the guardian or other person legally vested with the care of the person or estate of an incompetent or a minor shall be considered by the Board in the same manner and with the same effect as though such matters or actions had been submitted or taken by the ward, if the ward had capacity to act in his or her own behalf; Provided, however, That the Board may, if it deems it necessary, require the guardian or other person legally vested with the care of the person or estate of an incompetent or a minor to submit a certified copy of an order from the court of appointment authorizing some particular action which the guardian or other person legally vested with the care of the person or estate desires to take in connection with the application.
20 C.F.R. § 266.12