Electronic Clocks with Mains Power's BIS CRS (Compulsory Registration Scheme) certification guarantees adherence to IS 302 (Part 2): Section 26: 2014, encompassing safety criteria for residential and similar electrical appliances. Manufacturers have to apply, arrange for product testing at a BIS-registered lab, and send the required paperwork—including the Critical Component List (CCL) and Construction Data Form (CDF). Approved, BIS issues the CRS mark, therefore enabling legal sales in India. Foreign producers have to name an Authorized Indian Representative (AIR). The certification must be renewed often to keep compliance and lasts two years.