Section 21A of the ITA provides as follows: (1) Except as provided in this section, the basis year for a year of assessment shall constitute, in relation to a source of a company, limited liability partnership, trust body or co-operative society, the basis period for that year of assessment. (2) Subject to subsections (5) and (6), where a company, limited liability partnership, trust body or co-operative society made up the accounts of its operations for a period of twelve months ending on a day other than 31 December in the basis year, that period shall constitute the basis period for that year of assessment for any of its sources of income. (3) Where acompany, limited liability partnership, trust body or co-operative has made up the accounts of its operations for a period of twelve months ending on a day in a basis year and there is a failure to make up the accounts of the company, limited 15 liability partnership, trust body or co-operative society ending on the corresponding day in the following basis year, the Director General may direct that the basis period for the year of assessment in which the failure occurs, or the basis periods for that year and the following year of assessment, shall consist of a period or periods (which may be of any length) as specified in the direction. (3A)... (4) Subject to subsections (5) and (6), where a company, limited liability partnership, trust body or co-operative society commences operation on a day in a basis year for a year of assessment (hereinafter referred to as the "first year of assessment") and makes up its account — (a) for a period of less than twelve months ending on a day in that basis year, that period shall constitute the basis period for the first year of assessment; 16 (b) (c) S/N 6VadJUOpsOSIVdldl7 Injw for any period of months ending on a day in the immediately following basis year (hereinafter referred to as the "second basis year"), that period shall constitute the basis period for the year of assessment (hereinafter referred to as the "second year of assessment") immediately following the first year of assessment, there shall be no basis period in relation to any of its sources of income for the first year of assessment; or for a period of more than twelve months ending on a day in the basis year immediately following the second basis year, that period shall constitute the basis period for the year of assessment immediately following the second year of assessment and there shall be no basis period in relation to any of its sources of income for the first year of assessment and the second year of assessment. 17 (5) Where a company commences operations and — (a) is required under any law of the place of incorporation to make up its accounts ending on a specified day; or (b) being a company within a group of companies makes up its accounts ending on the same day as that of all other companies in that group, the period which begins from the day the company commences operations until the end of the accounting period of the company shall constitute, for those operations of that company, the basis period for a year of assessment. (6) Where a company, trust body or co-operative society on the day on which it commences a new operation is already carrying on one or more operations, the basis period of the existing operation or operations for a year of assessment in which that day falls shall constitute for the new operation the basis period for that year of 18 assessment and there shall be no basis period for the new operation for the year of assessment preceding that year. (7) (8) For the purposes of this section, "operations" in relation to a company trust body or co-operative society means — (a) an activity which consists of the carrying on of a business; (6)