531.504—Level of performance required for quality step increase.
         A quality step increase shall not be required but may be granted only to—
    
    
        
        (a) 
         An employee who receives a rating of record at Level 5 (“Outstanding” or equivalent), as defined in  part 430, subpart B, of this chapter; or
    
    
        
        (b) 
         An employee who, when covered by a performance appraisal program that does not use a Level 5 summary—
    
    
    
        
        (2) 
         Demonstrates sustained performance of high quality significantly above that expected at the “Fully Successful” level in the type of position concerned, as determined under performance-related criteria established by the agency.