301-1.2—What is an “employee” for purposes of TDY allowances?
         An “employee” is:
    
    
    
        
        (b) 
         An individual employed intermittently in Government service as an expert or consultant and paid on a daily when-actually-employed (WAE) basis; or
    
    
        
        (c) 
         An individual serving without pay or at $1 a year (also referred to as “invitational traveler”).