Code of Federal Regulations Title 5. Administrative Personnel § 5.847.107 Appeals to MSPB

(a) An individual whose rights or interests under the CSRS or FERS are affected by a final decision of the employing agency may request the Merit Systems Protection Board to review such decision in accordance with procedures prescribed by the Board.

(b) Paragraph (a) of this section is the exclusive remedy for review of agency decisions concerning eligibility to make an election under subparts B and D of this part. An agency decision must not allow review under any employee grievance procedures, including those established by 5 U.S.C. chapter 71, and 5 CFR part 771.