This rule finalizes without change an interim rule that amended the Department of the Treasury Acquisition Regulation (DTAR) by adding a subpart titled "Responsible Prospective Contractor" and a paragraph concerning Representation and certifications regarding responsibility matters, for the purpose of directing IRS contracting officers to the newly added DTAR subpart titled "Tax Check Requirement," which prescribes the policies and procedures for performing a tax check on the apparent successful offeror in order to determine eligibility to receive an award.