Relaxation of physical dispatch requirement under Regulation 58 permits electronic delivery for certain non-convertible security holders until extension. Limited relaxation of the obligation under Regulation 58(1)(b) permits omission of hard-copy dispatch of salient-feature statements to holders of listed non-convertible securities who have not registered email addresses, allowing electronic delivery instead; stock exchanges must notify issuers and disseminate the circular, which is issued under Section 11(1) of the SEBI Act read with Regulation 101 of the Listing Regulations.