For purposes of this subsection, "billing statement" means a monthly or periodic account statement that a person is required to provide to a customer under federal or state law, regulation or rule. This subsection does not prohibit a person from charging a reasonable fee for providing a replacement statement, a statement covering a custom date range or a statement requested for financial or legal purposes or for fulfilling any other labor-intensive or nonroutine request to provide copies of statements, as long as the fee is fully disclosed to and authorized by the customer prior to the copies being provided.