575.108—Approval criteria and written determination.
        
        (a) 
         For each determination to pay a recruitment incentive under this subpart, an agency must document in writing—
    
    
        
        (1) 
         The basis for determining that a position is likely to be difficult to fill, as determined under  § 575.106 ;
    
    
    
        
        (3) 
         The basis for the amount and timing of the approved recruitment incentive payment and the length of the required service period.
    
    
        
        (b) 
         An agency must make the determination to pay a recruitment incentive before the prospective employee enters on duty in the position for which recruited.