Section 754.204 - Appeal rights(a) An employee against whom an action is taken by OPM under § 754.203 may appeal to the Merit Systems Protection Board, under the regulations of the Board, but only to the extent the action concerns suspensions for more than 14 days or combines a suspension and a civil penalty. An appeal must be filed by not later than 30 days after the effective date of the action. The procedures for filing an appeal with the Board are found at 5 CFR part 1201.(b) If the Board finds that one or more of the charges brought by OPM against the employee is supported by a preponderance of the evidence, regardless of whether all specifications are sustained, it must affirm OPM's action. The Board may neither review whether the adverse action is for such cause as will promote the efficiency of the service, nor mitigate the duration of a suspension or the amount of a civil penalty ordered under this part.(c) An appeal against OPM is the exclusive avenue of appeal. The employee has no right to file a separate appeal against the employing agency for processing a personnel action as ordered by OPM under § 754.202 .(d) OPM's action under § 754.202 of this part is not subject to an agency's administrative grievance procedure or a negotiated grievance procedure under a collective bargaining agreement between an exclusive bargaining representative and any agency.