parties. (IV) To commence the audit, the mechanical licensing collective shall file with the Copyright Office a notice of intent to conduct an audit of the digital music provider, identifying the period of time to be audited, and shall simultaneously deliver a copy of such notice to the digital music provider. The Register of Copyrights shall cause the notice of audit to be published in the Federal Register within 45 calendar days after receipt. (V) The qualified auditor shall determine the accuracy of royalty payments, including whether an underpayment or overpayment of royalties was made by the digital music provider to the mechanical licensing collective, but before providing a final audit report to the mechanical licensing collective, the qualified auditor shall provide a tentative draft of the report to the digital music provider and allow the digital music provider a reasonable opportunity to respond to the findings, including by clarifying issues and correcting factual errors. (VI) The mechanical licensing collective shall pay the cost of the audit, unless the qualified auditor determines that there was an underpayment by the digital music provider of 10 percent or more, in which case the digital music provider shall bear the reasonable costs of the audit, in addition to paying the amount of any underpayment to the mechanical licensing collective. In case of an overpayment by the digital music provider, the mechanical licensing collective shall provide a credit to the account of the digital music provider. (VII) A digital music provider may not assert section 507 or any other Federal or State statute of limitations, doctrine of laches or estoppel, or similar provision as a defense to a legal action arising from an audit under this subparagraph if such legal action is commenced no more than 6 years after the commencement of the audit that is the basis for such action. (ii) Alternative verification procedures Nothing in this subparagraph shall preclude the mechanical licensing collective and a digital music