20 C.F.R. § 405.120 Effect of an initial determination.
Title 20 - Employees' Benefits
An initial determination is binding unless— (a) You request review by a Federal reviewing official within the 60-day time period stated in §405.210 of this part, or (b) We revise the initial determination under subpart G of this part.
Title 20: Employees' Benefits
PART 405—ADMINISTRATIVE REVIEW PROCESS FOR ADJUDICATING INITIAL DISABILITY CLAIMS
Subpart B—Initial Determinations
§ 405.120 Effect of an initial determination.

