17 C.F.R. § 229.1006
(c) Plans. Describe any plans, proposals or negotiations that relate to or would result in:
(d) Subject company negotiations. If the filing person is the subject company:
(1) State whether or not that person is undertaking or engaged in any negotiations in response to the tender offer that relate to:
(2) Describe any transaction, board resolution, agreement in principle, or signed contract that is entered into in response to the tender offer that relates to one or more of the matters referred to in paragraph (d)(1) of this section.
Instruction to Item 1006(d)(1): If an agreement in principle has not been reached at the time of filing, no disclosure under paragraph (d)(1) of this section is required of the possible terms of or the parties to the transaction if in the opinion of the board of directors of the subject company disclosure would jeopardize continuation of the negotiations. In that case, disclosure indicating that negotiations are being undertaken or are underway and are in the preliminary stages is sufficient.