General and major use customers may, with approval from the state, and with the assistance and approval of effected utilities, sell curtailment requirements to other regional general and major use customers, which would allow reduced curtailment for one customer and a commensurate increase in curtailment requirements for the other. No arrangement under this section may be carried out that contravenes the goals of regional curtailment. No sale of curtailment requirements may result in a net increase in actual electricity consumption during the curtailment year.