(a) The ROI date shall be adjusted in accordance with subdivision (b) or (c) of this section whenever, in accordance with specific provisions of statute, regulation or the contract, payment must be preceded by an inspection period or by an audit to determine the resources applied or used by a contractor in fulfilling the terms of the contract or otherwise to verify that the work, goods or services billed for were provided in accordance with the contract.

(b) Except as provided in subdivision (c) of this section, where a contract provides for an inspection or audit period, the ROI date shall be the original ROI date increased by the lesser of:

(c) Whenever in the course of an audit or inspection as described in subdivision (a) of this section, the corporation determines that there is a defect in the delivered goods, property or service, or defects in the invoice, or suspected improprieties of any kind, the corporation shall, no later than the expiration of the statutory or contractual audit or inspection period, notify the contractor of the defect or impropriety. In such case, the ROI date shall be the date that the corrected invoice, or goods or services, are delivered or provided, or the date that the impropriety is resolved, except where the corporation has failed to notify the contractor of such defect or suspected impropriety prior to the expiration of the audit or inspection period. In such case, the ROI date shall be the ROI date as determined in accordance with the preceding sentence, reduced by the number of days after the expiration of the audit or inspection period which the agency took to notify the contractor of the defect or suspected impropriety.