Same line of business criteria govern delisting of listed subsidiaries via scheme of arrangement, requiring certification and listing tenure. SEBI requires objective criteria for a listed holding company and listed subsidiary to qualify as being in the same line of business: same NIC three digit principal activity; at least fifty percent of each company's revenue and net tangible assets attributable to the same line of business per the latest audited annual results; post name change revenue continuity on a restated consolidated basis; and mutual self certification. All such criteria must be certified by the statutory auditor and a SEBI registered merchant banker, and the entities must satisfy prescribed listing tenure conditions.