What if my employer determines my error is not subject to these rules?
Primary source
Verbatim text below is from the Electronic Code of Federal Regulations (eCFR), a public-domain U.S. government work. Always verify the current version with the eCFR before relying on it for any legal matter.
Full Text
(a) Your employer must provide you with a written decision. The decision must include the reason for the decision, and notice of your right to appeal the decision to the MSPB.
(b) If your employer determines that it cannot waive the time limit for making an election under § 839.612, the decision must inform you of your right to ask OPM to review the decision. OPM will advise you in writing of your appeal rights following its review of your employer's decision.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.