Income and Corporation Taxes Act 1988

13 (1) In determining, in the case of a share option scheme, for the purposes of paragraph 12(1)(c) above whether scheme shares which are or are to be acquired by any person are subject to any restrictions, there shall be regarded as a restriction attaching to the shares any contract, agreement, arrangement or condition by which his freedom to dispose of the shares or of any interest in them or of the proceeds of their sale or to exercise any right conferred by them is restricted or by which such a disposal or exercise may result in any disadvantage to him or to a person connected with him.

(2) Sub-paragraph (1) does not apply to so much of any contract, agreement, arrangement or condition as contains provisions similar in purpose and effect to any of the provisions of the Model Rules set out in the Model Code for Securities Transactions by Directors of Listed Companies issued by the Stock Exchange in November 1984.