20 C.F.R. § 217.3
In addition to meeting other requirements, a person must file an application to become entitled to an annuity or lump sum. Filing an application will—
(c) Provide the right to appeal if the person is dissatisfied with the decision (see part 260 of this chapter).
(Approved by the Office of Management and Budget under control numbers 3220-0030, 3220-0031 and 3220-0042)
[47 FR 7647, Feb. 22, 1982, as amended at 52 FR 11017, Apr. 6, 1987]