Under Indian Standard IS 13252 (Part 1), Mail Processing Machines, Postage Machines, and Franking Machines must have their BIS CRS (Compulsory Registration Scheme) certification. This guarantees adherence to Bureau of Indian Standards (BIS) specified safety and quality criteria. Manufacturers have to send necessary paperwork, test their goods in a BIS-approved lab, then apply using the BIS portal. Authorized Indian Representatives (AIR) are required of foreign manufacturers. Products can have the BIS CRS mark attached once certified to guarantee market acceptability in India. Maintaining certification depends on regular renewals and following BIS policies.