What are the changes brought about by the Constitution (First Amendment) Act, 1951, s. 13 in terms of the office of the Comptroller and Auditor-General of India?
The Constitution (First Amendment) Act, 1951, s. 13 made the following changes in terms of the office of the Comptroller and Auditor-General of India:

1. Provisions as to Comptroller and Auditor-General of India: The Auditor-General of India holding office immediately before the commencement of this Constitution shall, unless he has elected otherwise, become on such commencement the Comptroller and Auditor-General of India.
2. Salaries, leave of absence, and pension: The Act provides for salaries, rights in respect of leave of absence, and pensions for the Comptroller and Auditor-General of India as per clause (3) of article 148.
3. Tenure: The Act allows the incumbent Auditor-General to continue holding office until the expiration of his term of office as determined under the provisions which were applicable to him immediately before such commencement.