They shall be signed by two principal officers of each cooperative merging or consolidating, sealed with the seal of each such cooperative, filed, and recorded as an amendment to the articles

— under COOPERATIVES--REORGANIZATION AND DISSOLUTION.

Unless otherwise specified in the plan, the merger, or consolidation is effective when the articles are so recorded. Source: SDC 1939, § 11.1140 (1) as enacted by SL 1965, ch 23 , § 1.