4The regulations may include provision—
(a)about how information about a product is to be provided (for example, by affixing a label to the product);
(b)conferring on specified persons the function of determining whether specified products or materials have specified properties or characteristics (for example, whether they can be recycled) and publishing the results of such determinations;
(c)specifying a scheme for classifying products by reference to matters about which resource efficiency information must be provided;
(d)requiring information provided about a product to be determined according to specified criteria (for example, according to results published by virtue of paragraph (b) or classification schemes under paragraph (c)).