(6)The purpose of the data waiver is to provide an exemption from the obligation to use five years' historic data for the estimation of IRB parameters for types of exposures that exist in the institution's portfolio, when the institution first implements the IRB Approach. After five years from that first implementation, institutions should have collected sufficient data to no longer require use of the waiver. Therefore, data waiver permissions should not be granted after five years from the date an institution started implementing the IRB Approach.