These temporary regulations modify the rules relating to the filing by certain corporate taxpayers of a statement with their Federal corporate income tax returns under section 6011(a), the registration of confidential corporate tax shelters under section 6111(d), and the maintenance of lists of investors in potentially abusive tax shelters under section 6112. These regulations provide the public with additional guidance needed to comply with the disclosure rules, the registration requirement, and the list maintenance requirement applicable to tax shelters. The temporary regulations affect corporations participating in certain reportable transactions, persons responsible for registering confidential corporate tax shelters, and organizers of potentially abusive tax shelters. The text of these 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 of this issue of the Federal Register.