The agreement so adopted shall be executed by an authorized person, provided that if the agreement is filed, it shall be executed and acknowledged in accordance with § 103 of this title. Any of the terms of the agreement of merger or consolidation may be made dependent upon facts ascertainable outside of such agreement, provided that the manner in which such facts shall operate upon the terms of the agreement is clearly and expressly set forth in the agreement of merger or consolidation. The term "facts," as used in the preceding sentence, includes, but is not limited to, the occurrence of any event, including a determination or action by any person or body, including the corporation.
As used in this subsection only, the term "holding company" means a corporation which, from its incorporation until consummation of a merger governed by this subsection, was at all times a direct or indirect wholly-owned subsidiary of the constituent corporation and whose capital stock is issued in such merger. From and after the effective time of a merger adopted by a constituent corporation by action of its board of directors and without any vote of stockholders pursuant to this subsection:
If an agreement of merger is adopted without the vote of stockholders of a corporation pursuant to this subsection, the secretary or assistant secretary of the surviving corporation shall certify on the agreement that the agreement has been adopted pursuant to this subsection and that the conditions specified in this subsection (other than the condition listed in paragraph (h)(4) of this section) have been satisfied; provided that such certification on the agreement shall not be required if a certificate of merger is filed in lieu of filing the agreement. The agreement so adopted and certified shall then be filed and shall become effective, in accordance with § 103 of this title. Such filing shall constitute a representation by the person who executes the agreement that the facts stated in the certificate remain true immediately prior to such filing.
8 Del. C. § 251