Corp. Code, § 15911.15

(a) Unless a future effective date or time is provided in a certificate of merger or the agreement of merger, if an agreement of merger is required to be filed under Section 15911.14, in which event the merger shall be effective at that future effective date or time, a merger shall be effective upon the filing of the certificate of merger or the agreement of merger, as is applicable, in the office of the Secretary of State.

(b) (1) For all purposes, a copy of the certificate of merger duly certified by the Secretary of State is conclusive evidence of the merger of (A) the constituent limited partnerships, either by themselves or together with constituent other business entities, into the surviving other business entity, or (B) the constituent limited partnerships or the constituent other business entities, or both, into the surviving limited partnership.

(2) In a merger in which the surviving entity is a corporation in a merger in which a domestic corporation and a domestic limited partnership are parties to the merger, a copy of an agreement of merger certified on or after the effective date by an official having custody thereof has the same force in evidence as the original and, except as against the state, is conclusive evidence of the performance of all conditions precedent to the merger, the existence on the effective date of the surviving corporation, and the performance of the conditions necessary to the adoption of any amendment to the articles of incorporation of the surviving corporation, if applicable, contained in the agreement of merger.