4.—(1) Amend Article 5 (interpretation: definitions of “material change of circumstances” and “the time of valuation”) as follows.
(2) For the words from “and, in” to “and 2” substitute “has the meaning assigned to it by paragraph 1”.
(3) In the heading to that Article—
(a)for “definitions” substitute “definition”;
(b)omit “and “the time of valuation””.