Which of the following points is/are "correct" with respect to the recent step taken by the Securities and Exchange Board of India (SEBI) in March 2024?

A. SEBI expanded the framework of Qualified Stock Brokers (QSBs) to more stock brokers in order to protect the interest of investors, build trust in the securities market, and strengthen the compliance culture among stock brokers.
B. This information by SEBI is issued in the exercise of its powers conferred under Section 11(1) of Chapter IV of the SEBI Act, 1992, read with Regulation 30 of Chapter VII of SEBI (Stock Brokers) Regulations, 1992.
C. SEBI has notified the SEBI (Index Providers) Regulations, 2024 mandating registration for index providers managing important indices based on Indian-listed securities.