law: The Income-Tax Act, 1961
  5. Scope of total income.-
  (1) Subject to the provisions of this Act, the total income of any previous year of a person who is a resident includes all income from whatever source derived which-
  (a) is received or is deemed to be received in India in such year by or on behalf of such person; or
  (b) accrues or arises or is deemed to accrue or arise to him in India during such year; or
  (c) accrues or arises to him outside India during such year:
  Provided that, in the case of a person not ordinarily resident in India within the meaning of sub-section (6) of section 6, the income which accrues or arises to him outside India shall not be so included unless it is derived from a business controlled in or a profession set up in India.
  (2) Subject to the provisions of this Act, the total income of any previous year of a person who is a non-resident includes all income from whatever source derived which-
  (a) is received or is deemed to be received in India in such year by or on behalf of such person; or
  (b) accrues or arises or is deemed to accrue or arise to him in India during such year.
  Explanation 1.-Income accruing or arising outside India shall not be deemed to be received in India within the meaning of this section by reason only of the fact that it is taken into account in a balance sheet prepared in India.
  Explanation 2.-For the removal of doubts, it is hereby declared that income which has been included in the total income of a person on the basis that it has accrued or arisen or is deemed to have accrued or arisen to him shall not again be so included on the basis that it is received or deemed to be received by him in India.
  1[5A. Apportionment of income between spouses governed by Portuguese Civil Code.-
  (1) Where the husband and wife are governed by the system of community of property (known under the Portuguese Civil Code of 1860 as "COMMUNIAO DOS BENS") in force in the State of Goa and in the Union territories of Dadra and Nagar Haveli and Daman and Diu, the income of the husband and of the wife under any head of income shall not be assessed as that of such community of property (whether treated as an association of persons or a body of individuals), but such income of the husband and of the wife under each head of income (other than under the head "Salaries") shall be apportioned equally between the husband and the wife and the income so apportioned shall be included separately in the total income of the husband and of the wife respectively, and the remaining provisions of this Act shall apply accordingly.
  (2) Where the husband or, as the case may be, the wife governed by the aforesaid system of community of property has any income under the head "Salaries", such income shall be included in the total income of the spouse who has actually earned it.]
  1. Ins. by Act 32 of 1994, s. 4 (w.e.f. 1-4-1963).