(1) It shall not be lawful for a company to pay a director remuneration (whether as director or otherwise) free of income tax or of income tax and sur-tax or of sur-tax, or otherwise calculated by reference to or varying with the amount of his income tax or his income tax and sur-tax or his sur-tax, or to or with the rate of income tax or sur-tax except under a contract which was in force on the 31st day of March, 1962, and provides expressly, and not by reference to the articles, for payment of remuneration as aforesaid.
(2) Any provision contained in a company's articles or in any contract other than such a contract as aforesaid, or in any resolution of a company or a company's directors, for payment to a director of remuneration as aforesaid shall have effect as if it provided for payment, as a gross sum subject to income tax and sur-tax, of the net sum for which it actually provides.
(3) This section shall not apply to remuneration due before the operative date or in respect o