Nothing contained in this chapter shall be construed to require the Department to curtail the supply of electricity to any customer when, in the discretion of the Department or an appeal board, such energy is required by that customer to maintain an adequate level of public health and safety, nor shall anything in this chapter be construed so as to require action by any customer which would violate any federal, state or local law, rule, or regulation, or endanger the health and safety of any person, or fail to provide a minimal level of security.