(a) 
         Materials produced after July 1, 1991, by convict labor may only be incorporated in a Federal-aid highway construction project if such materials have been:
     
    
        
        (1) 
         Produced by convicts who are on parole, supervised release, or probation from a prison or
     
    
        
        (2) 
         Produced in a qualified prison facility and the cumulative annual production amount of such materials for use in Federal-aid highway construction does not exceed the amount of  such materials produced in such facility for use in Federal-aid highway construction during the 12-month period ending July 1, 1987.
     
    
        
        (b) 
        
            Qualified prison facility means any prison facility in which convicts, during the 12-month period ending July 1, 1987, produced materials for use in Federal-aid highway construction projects.
     
    
        
            Code of Federal Regulations
        
        [53 FR 1923, Jan. 25, 1988, as amended at 58 FR 38975, July 21, 1993]