(1) In this section "agreement" means an agreement, whether a contract of employment or not, and whether made before or after the commencement of this Act.

(2) A provision in an agreement shall be void in so far as it purports to exclude or limit the application of any provision of this Act or is inconsistent with any provision of this Act.

(3) A provision in an agreement which is or becomes less favourable in relation to an adopting parent than a similar or corresponding entitlement conferred on the adopting parent by this Act shall be deemed to be so modified as to be not less favourable to the adopting parent.