5 CFR § 353.304 - Appeals to the Merit Systems Protection Board.
(a) Except as provided in paragraphs (b) and (c) of this section, an injured employee or former employee of an agency in the executive branch (including the U.S. Postal Service and the Postal Rate Commission) may appeal to the MSPB an agency's failure to restore, improper restoration, or failure to return an employee following a leave of absence. All appeals must be submitted in accordance with MSPB's regulations.
(b) An individual who fully recovers from a compensable injury more than 1 year after compensation begins may appeal to MSPB as provided for in parts 302 and 330 of this chapter for excepted and competitive service employees, respectively.
(c) An individual who is partially recovered from a compensable injury may appeal to MSPB for a determination of whether the agency is acting arbitrarily and capriciously in denying restoration. Upon reemployment, a partially recovered employee may also appeal the agency's failure to credit time spent on compensation for purposes of rights and benefits based upon length of service.