SDCL § 3-10-5: Withholding from salary and purchase of annuity--Periodic payments.

When so authorized by an employee, it shall be the duty of the employer to withhold the amount designated from the salary of the employee and to purchase a retirement annuity from a company or organization licensed to do business in the State of South Dakota, for such employee and to make the periodic payments on such retirement annuity according to the terms of the annuity contract.