The following incomes of the taxpayer  shall be classified as income from business, namely:-

(a) any profits and profits of a business carried on or deemed to   be carried on by the taxpayer at any time during the income year;  

(b) any income derived by any business or professional organization or by any such organization from rendering certain services to its members;

(c) the fair market value of any benefit arising out of or in   continuation of a person’s past, present or potential future business relationship, whether convertible into cash or not;

(d) any management fee incurred by any management company, including Mudaraba Management Company;

(e)any amount due to the lessor bank, insurance or financial institution against leasing to any other person any asset   owned by himself or others;

 (f) realized gain from currency exchange subject to the Third   Schedule; 

(g) any income received during the income year from a discontinued business.