Elle a été étendue aux familles de 2 enfants à compter du 1 Janvier 1995.
lever to obtain higher pay than the pay which was obtained by negotiation, by first negotiating higher pay for women than men on some aspects of pay and higher pay for men than women on other aspects of pay, and then invoking the equal pay principle in favour of the female and male dominated groups to obtain the negotiated results gained by the other gender group.