25.—(1) The Commissioners may agree rules for measuring weight with any person in writing (an “agreed method”).
(2) The rules that may be agreed under paragraph (1) may (among other things) make provision—
(a)for the method by which weight is to be measured;
(b)for alternative times at which the weight of any thing may be measured in substitution for those specified by regulation 24 (but a rule providing for an alternative time must be agreed before any measurement of weight is made);
(c)for the evidence that must be kept of the measurement of weight;
(d)to disregard goods contained within a packaging component that is imported;
(e)relating to a product line or a production run to which the agreed method may be applied.
(3) Rules agreed under paragraph (1) may only be applied—
(a)by the person with whom the Commissioners have agreed those rules; and
(b)where the Commissioners have not given a notification under paragraph (4),
but they may be applied in relation to measurements of weight obtained by the person with whom the rules are agreed from another person.
(4) Where the Commissioners believe that rules agreed under paragraph (1)—
(a)do not, or no longer, give an accurate indication of the weight of any thing;
(b)have not been complied with by the person with whom they have been agreed; or
(c)should no longer be applied for any other reason,
they may decide that the rules no longer apply, in whole or in part, and notify the person with whom the rules were agreed of that fact.