Under that section, the audit by the Comptroller and Auditor General is principally intended for the purposes of satisfying him with regard to the sufficiency of the rules and procedures prescribed for the purpose of i;ecuring an effective check on the assessment, collection and proper allocation of revenue. He is entitled to examine the accounts in order to ascertain whether the rules and procedures are being duly observed, and he is required, upon such examination, to submit a report. His powers in respect of the audit of income-tax receipts and refunds are outlined in the Board's Circular No. 14/19/ 56-II dated July 28, 1960(3 ). Paragraph 2 of the Circular repeats the provisions of section 16 of the Comptroller and Auditor General's (Duties, Powers and Conditions of Service) Act, 1971. And paragraph 3 warns that "the Audit Depart,ment should not in any way substitute itself for the revenue authorities in the performance of their statutory duties." Paragraph 4 declares : "4. Audit does not consider it any part of its duty to pass in review the judgment exercised or the decision taken in individual cases by officers ,entrusted with those duties, but it must be recognised that an examination of such cases ·may be an important factor in judging the effectiveness of assessment procedure ...... It is however, to forming a general judgment rather than to the detection of individual errors of assessment, etc. that the audit enquiries should be (I) Internal Audit Ma,nual, Vol, II p. I. (2) "16. Audit of receipts of Union or of States. It shall be the duty of the Comptroller and Auditor-General to audit all receipts which are payable into the Consolidated Fund of India and of each State and of each Union Territory having a Legislative Assembly and to satisfy himself that the rules and procedures in that behalf are designed to secure an effective check on the assessment, collection and proper allocation of revenue and are being duly observed and to _make for this purpose such examination of the accounts as he thinks fit and report thereon." {l) Internal Audit Manual, Vol. II p. 39.