SDCL § 9-5-9: Effective date of annexation--Implementing ordinance.

Except as otherwise provided in the plan for consolidation, when certified copies of the proceedings are so filed, the annexation shall be effective and complete and the municipality to which the annexation is made shall have the power, and it shall be its duty, to pass such ordinance as will carry into effect such annexation, and thereafter the municipality annexed shall be a part of the municipality to which the annexation is made.