; or (bb) the ASHRAE/ANSI/IESNA Standard 90.1–2013 for commercial buildings; or (II) the applicable State building code in effect on the date of enactment of this section; and (ii) the baseline for calculating savings from appliance standards shall be the average efficiency of new appliances in the applicable one or more categories prior to the adoption and implementation of the new standard. (7) Combined heat and power system The term combined heat and power system means a system that uses the same energy source both for the generation of electrical or mechanical power and the production of steam or another form of useful thermal energy, if— (A) the system meets any requirements relating to efficiency and other operating characteristics that the Secretary promulgates by regulation; and (B) the net wholesale sales of electricity by a facility does not exceed 50 percent of total annual electric generation by the facility. (8) Cost-effective The term cost-effective , with respect to an energy efficiency measure, means that the measure achieves a net present value of economic benefits over the life of the measure, both directly to the energy consumer and to the economy, that is greater than the net present value of the cost of the measure over the life of the measure, both directly to the energy consumer and to the economy, using the societal benefit-cost test calculated using the lower of a utility weighted average cost of capital or a social discount rate of 3 percent. (9) Customer facility savings The term customer facility savings means a reduction in end-use electricity or natural gas consumption (including waste heat energy savings) at a facility of an end-use consumer of electricity or natural gas served by a retail electricity supplier or natural gas supplier, as compared to— (A) in the case of a new facility, consumption at a reference facility of average efficiency; (B) in the case of an existing facility, consumption at the facility during a base period of not less than 1 year