50.74—Notification of change in operator or senior operator status.
         Each licensee shall notify the appropriate Regional Administrator as listed in appendix D to  part 20 of this chapter within 30 days of the following in regard to a licensed operator or senior operator:
    
    
        
        (a) 
         Permanent reassignment from the position for which the licensee has certified the need for a licensed operator or senior operator under  § 55.31(a)(3) of this chapter ;