SDCL § 62-7-5: Agreement as to compensation--Approval by department.

If the employer and employee reach an agreement in regard to the compensation under this title, a memorandum of the agreement shall be filed with the department by the employer or employee. Unless the department within twenty days notifies the employer and employee of its disapproval of the agreement by letter sent to their addresses as given in the memorandum filed, the agreement shall stand as approved and is enforceable for all purposes under the provisions of this title.