Explain the provisions of the Companies Act, 2013 relating to 'secretarial audit'. State whether 'secretarial audit' is mandatory for all companies.

Section 204 of the Companies Act, 2013 mandates every listed company and such other classes of prescribed companies to annex a Secretarial Audit Report, given by a Company Secretary in Practice with its Board's report. As per Rule 9 of Companies (Appointment & Remuneration of Managerial Personnel) Rules, the other class of companies shall be as under: (a) Every public company having a paid-up share capital of ₹50 crore or more; or (b) Every public company having a turnover of ₹250 crore or more. It shall be the duty of the company to give all assistance and facilities to the company secretary in practice for auditing the secretarial and related records of the company.