Income and Corporation Taxes Act 1988

24 (1) The scheme must provide for a person’s contributions under the certified contractual savings scheme to be of such amount as to secure as nearly as may be repayment of an amount equal to that for which shares may be acquired in pursuance of rights obtained under the scheme; and for this purpose the amount of repayment under the certified contractual savings scheme shall be determined as mentioned in paragraph 17 above.

(2) The scheme must not—

(a) permit the aggregate amount of a person’s contributions under certified contractual savings schemes linked to savings-related share option schemes approved under this Schedule to exceed £100 monthly, nor

(b) impose a minimum on the amount of a person’s contributions which exceeds £10 monthly.

(3) The Treasury may by order amend sub-paragraph (2) above by substituting for any amount for the time being specified in that sub-paragraph such amount as may be specified in the order.