If the CVS system is used for sampling during the idle emission test, the calibration instructions are specified in  40 CFR part 1065, subpart D, for heavy-duty engines, and  § 86.119-78 for light-duty trucks.
     
    
        
            Code of Federal Regulations
        
        [70 FR 40441, July 13, 2005. Redesignated at 73 FR 37194, June 30, 2008]