Section 14(5)(i) in The Central Motor Vehicles (Accreditation of Bus Body Builders) Order, 2007
(i)The Bus Body Builder, if so desires, may request in writing to Zonal Accreditation Board for the change in the category of Accreditation. For this purpose, Zonal Accreditation Board shall assess the Bus Body Builder during surveillance/re-assessment visit or may organize a supplementary or a special visit; and