The GEMS level requirements for a product class are as follows:
(a) requirements relating to one or more of the following:
(i) the amount of energy used by operating products in that product class;
(ii) the amount of greenhouse gases resulting from operating products in that product class;
(iii) the effect of those products on the amount of energy used by operating other products;
(b) requirements for conducting tests in relation to products in that product class, using the methods specified in the determination, in order to determine whether products in that product class meet the requirements referred to in paragraph (a).