831.910—Review of decisions.
        
        (a) 
         The final decision of an agency head or OPM issued to an employee, former employee, or survivor as the result of a request for determination filed under  § 831.906 may be appealed to the Merit Systems Protection Board under procedures prescribed by the Board.
    
    
        
        (b) 
         The final decision of an agency head that a break in service referred to in  § 831.904(a)(2) did not begin with an involuntary separation within the meaning of 5 U.S.C. 8336(d)(1) may be appealed to the Merit Systems Protection Board under procedures prescribed by the Board.