Right to convert. Subject to the approval by the directors of the company and by the holders of the majority of outstanding class D shares, any holders of class A shares shall have the right, if he so decides, to exchange all or part of the class A shares that he holds for class D shares, according to the prorata and conditions hereunder contained: the rate of conversion shall be one (1) class D share for each class A share exchanged, the new class D share representing the same amount added to the stated capital account issued and paid for the converted class A share. A class A shareholder who wishes to prevail himself of this right of exchange shall submit to the head office of the company or its transfer agent a written notice indicating the number of class A shares he wishes to exchange. The notice shall bear the signature of the shareholder registered in the register of securities of the company as being the sole qualified person to exercise the rights attached to the shares, or the signature of his representative. Certificates representing the class A shares submitted for exchange shall be attached to the On the date of exchange, the converted class A shares shall automatically be cancelled, and the company shall amend accordingly its issued and paid-up share capital account for class A and D shares in conformity with the provisions of sections 123.50 and 123.51 of the COMPANIES ACT.