Circular No. 29-IncomeTax Attention is invited to the Board’s Circular Nos. 5-P(LXX-6) of 1968 and 12-P(LXX-7) of 1968 [Clarification 2] which had been duly endorsed to all Chambers of Commerce. References are still being received from the public seeking clarifications regarding the taxability of income under the provisions of sections 11(1) and 11(2).