(3) 3[ any receipts which are of a casual and non- recurring nature, 4[ to the extent such receipts do not exceed five thousand rupees in the aggregate:] 5[ Provided that where such receipts relate to winnings from races including horse races, the provisions of this clause shall have effect as if for the words" five thousand rupees", the words" two thousand five hundred rupees" had been substituted: Provided further that this clause shall not apply to-
(i) capital gains chargeable under the provisions of section 45; or
(ii) receipts arising from business or the exercise of a profession or occupation; or
(iii) receipts by way of addition to the remuneration of an employee;] I[]