5.—(1) Articles 2 and 3 above shall have effect in relation to initial notices which come into force on or after the day on which this Order comes into force.
(2) Subject to paragraph (3) below, Article 4 above shall have effect in relation to initial notices which came into force before, as well as in relation to those which come into force on or after, the day on which this Order comes into force.
(3) In relation to an initial notice which came into force before the day on which this Order comes into force, Article 4 above shall not have effect in relation to work to which the notice related immediately before that day.
(4) In this article, “initial notice” has the same meaning as in Part II of the 1984 Act.