Subject to this Act, the provisions of the Swiss 1980 agreement, so far as those provisions affect Australian tax, continue to have the force of law:
(a) in relation to withholding tax--in respect of dividends or interest derived on or after 1 January 1979 and in relation to which the agreement remains effective; and
(b) in relation to tax other than withholding tax--in respect of income of the year of income that commenced on 1 July 1979 and of a subsequent year of income in relation to which the agreement remains effective.