This document contains temporary regulations relating to the disclosure of return information, pursuant to section 6103(n) of the Internal Revenue Code (Code), by an officer or employee of the Treasury Department, to a whistleblower and, if applicable, the legal representative of the whistleblower, to the extent necessary in connection with a written contract among the IRS, the whistleblower and, if applicable, the legal representative of the whistleblower, for services relating to the detection of violations of the internal revenue laws or related statutes. The temporary regulations will affect officers and employees of the Treasury Department who disclose return information to whistleblowers, or their legal representatives, in connection with written contracts among the IRS, whistleblowers and, if applicable, their legal representatives, for services relating to the detection of violations of the internal revenue laws or related statutes. The temporary regulations will also affect any whistleblower, or legal representative of a whistleblower, who receives return information in connection with a written contract among the IRS, the whistleblower and, if applicable, the legal representative of the whistleblower, for services relating to the detection of violations of the internal revenue laws or related statutes. The text of the temporary regulations also serves as the text of the proposed regulations set forth in the notice of proposed rulemaking on this subject in the Proposed Rules section in this issue of the Federal Register.