(1) A GEMS determination may specify any or all of the following for any one or more product classes covered by the determination:
(a) requirements for products in that product class to meet a specified level (the high efficiency level ) at a particular time (see subsection (2));
(b) requirements relating to the performance of products in that product class (see subsection (3));
(c) requirements relating to the impact of products in that product class on the environment or the health of human beings (see subsection (3));
(d) requirements of a kind specified in the regulations for the purposes of this paragraph;
(e) requirements for conducting tests in relation to products in that product class, using the methods specified in the determination, in relation to a requirement mentioned in paragraph (a), (b), (c) or (d).
(2) The requirements referred to in paragraph (1)(a) (high efficiency level) must relate to one or more of the following:
(a) the amount of energy used by operating products in that product class;
(b) the amount of greenhouse gases resulting from operating products in that product class;
(c) the effect of those products on the amount of energy used by operating other products that use energy.
(3) Requirements may be specified in relation to a product class under paragraph (1)(b) (product performance) or (c) (impact of products on environment or human health) only if:
(a) the GEMS determination also specifies GEMS level requirements for the product class; or
(b) all of the following apply:
(i) the GEMS determination also specifies GEMS labelling requirements for the product class;
(ii) the requirements specified under paragraph (1)(b) or (c) enhance the efficacy of the specified GEMS labelling requirements;
(iii) the specified GEMS labelling requirements relate to one or more of the matters specified in any of the paragraphs in subsection (2).