171. The accounts relating to the discharge of the functions of the Crown in its relations with Indian States shall be audited by the Auditor-General of India, or, in so far as those accounts concern transactions in the United Kingdom, by the Auditor of Indian Home Accounts acting on his behalf and under his general superintendence, and the Auditor-General of India shall make to the Secretary of State annual reports on the accounts so audited by him or on his behalf.