(a) Identification.
         A vitamin D test system is a device intended for use in clinical laboratories for the quantitative determination of 25-hydroxyvitamin D (25-OH-D) and other hydroxylated metabolites of vitamin D in serum or plasma to be used in the assessment of vitamin D sufficiency.
     
    
        
        (b) Classification.
         Class II (special controls). Vitamin D test systems must comply with the following special controls:
     
    
        
        (1) 
         Labeling in conformance with  21 CFR 809.10 and
     
    
        
        (2) 
         Compliance with existing standards of the National Committee on Clinical Laboratory Standards.
     
    
        
            Code of Federal Regulations
        
        [63 FR 40366, July 29, 1998]