31.—(1) Article 29 of the Child Support Order (collection of child support maintenance) is amended as follows.
(2) In paragraph (3) (provision which may be made by regulations for payment of child support maintenance), for sub-paragraph (c) substitute—
“(c)for determining, on the basis of prescribed assumptions, the total amount of the payments of child support maintenance payable in a reference period (including provision for adjustments to such an amount);
(ca)requiring payments of child support maintenance to be made—
(i)by reference to such an amount and a reference period; and
(ii)at prescribed intervals falling in a reference period;”.
(3) After that paragraph insert—
“(3A) In paragraph (3)(c) and (ca) “a reference period” means—
(a)a period of 52 weeks beginning with a prescribed date; or
(b)in prescribed circumstances, a prescribed period.”.