Discuss the powers of the Reserve Bank of India (RBI) in respect of 'Group Companies', under the RBI Act, 1934.

Section 45NAA of the Reserve Bank of India Act, 1934 provides that the Reserve Bank may, at any time, direct a non-banking financial company to annex to its financial statements or furnish separately, within such time and at such intervals as may be specified by the Bank, such statements and information relating to the business or affairs of any group company of the non-banking financial company as the Bank may consider necessary or expedient to obtain for the purposes of RBI Act. Notwithstanding anything to the contrary contained in the Companies Act, 2013, the Reserve Bank may, at any time, cause an inspection or audit to be made of any group company of a non-banking financial company and its books of account.