(1) In a case where -

(a) an agreement or order to which this section applies contains a provision in which differences in rates of remuneration are based on any of the discriminatory grounds, and

(b) in relation to a person to whom the agreement or order relates, that provision conflicts with an equal remuneration term in that person's contract of employment,

then, subject to subsection (4), that provision shall be null and void.

(2) If an agreement or order to which this section applies contains a provision which does not fall within subsection (1) but which gives rise to discrimination in relation to any of the matters in paragraphs (a) to (e) of section 8(1) then, subject to subsection (4), that provision shall be null and void.

(3) This section applies to the following agreements and orders, whether made before or after the coming into operation of this section:

(a) collective agreements;

(b) employment regulation orders, within the meaning of Part IV of the Industrial Relations Act, 1946; and

(c) registered employment agreements, within the meaning of Part III of that Act.

(4) In the case of a provision which -