Majority consent requirement for material changes to non-convertible securities: stock-exchange approval plus board, trustee and holder consent. Listed entities must obtain prior stock exchange approval before making material modifications to the structure of non-convertible debt securities or non-convertible redeemable preference shares; such approval requires board approval, debenture trustee approval where applicable, and the written consent of the requisite majority of holders of that class of securities, with the listed entity providing remote e voting to facilitate consent.