Confidential customer information; protection

B. Notwithstanding any other law, records and proceedings relating to competitive activity, including trade secrets or privileged or confidential commercial or financial information, if disclosure of the information could give a material advantage to another entity, are not open to public inspection and may not be made public except by order of the public power entity's governing body. The information protected as confidential under this section is any information that is similar to the information that would be confidential under section 40-204 if reported by a public service corporation to the Arizona corporation commission.