Section 27. Assessment to be made on past year's income

27. Assessment to be made on past year's income. Assessment when assessee becomes chargeable within year. 28. Notice to persons chargeable. 29. Officer to give receipts. 30. Contents of receipt. --- 27. Every such assessment shall be made upon the full amount of such person's income during the year ending on the day of the year next before the year of assessment on which his accounts have been usually made up, or on the thirty-first day of March 1871. In the case of a person for the first time becoming chargeable under this Part within the year of assessment, or within the year next before such year, the assessment shall be made according to an average of his income for such period as the Collector, under the circumstances, directs.