The (1) ; 622 relevant part of it, before the Finance Act, 1955, read: "(1) Where any assessee sustains a loss of profits or gains in any years under any of the heads mentioned in section 6, he shall be entitled to have the amount of the loss set off against his income, profits or gains under any other head in that year." (2) Where any assessee sustains a loss of profits or gains in any year, being a previous year not earlier than the previous year for the assessment for the year ending on the 31st day of March, 1940, in any business, profession or vocation, and the loss cannot be wholly set off under subsection (1), so much of the loss as is not so set off or the whole loss where the assessee had no other head of income shall be carried forward to the following year and set off against the profits and gains, if any, of the assessee from the same business, profession or vocation for that year; and if it cannot be wholly set off, the amount of loss not so set off shall be carried forward to the following year.