The expression “financial year” in Part II of this Schedule means the year in respect of which the accounts of the company or of the business, as the case may be, are made up, and where by reason of any alteration of the date on which the financial year of the company or business terminates the accounts of the company or business have been made up for a period greater or less than a year, that greater or less period shall for the purpose of that Part of this Schedule be deemed to be a financial year.