Which categories of companies are required to have Audit Committee of Board (ACB) as per the Companies Act, 2013 and as per the SEBI (LODR) Regulations, 2015.

Section 177(1) of the Companies Act, 2013 provides that the Board of Directors of every listed public company and such other class or classes of companies, as may be prescribed, shall constitute an Audit Committee. Rule 6 of the Companies (Meetings of Board & its Powers) Rules, 2014 states that the Board of directors of every listed public company and a company covered under Rule 4 of the Companies (Appointment and Qualification of Directors) Rules, 2014 shall constitute an 'Audit Committee' and a 'Nomination and Remuneration Committee of the Board'. The class of companies covered under Rule 4 of Companies (Appointment and Qualification of Directors) Rules, 2014 are- All listed public companies All public companies with a paid up capital of ₹ 10 crore rupees or more; All public companies having turnover of ₹ 100 crore rupees or more; All public companies, having in aggregate, outstanding loans or borrowings or debentures or deposits exceeding ₹ 50 crore rupees or more. Regulation 18(1) of SEBI Listing Regulations, 2015 provides that every listed entity shall constitute a qualified and independent audit committee in accordance with the terms of reference.