No statement of costs, or amendment thereto, may take effect until approved by the secretary of social services and the expiration of thirty days from the filing thereof, and thereafter, for purposes of this chapter, shall remain in full force and effect until the next statement of costs, or amendment thereto, filed by the hospital pursuant to § 28-13-28 is approved by the secretary. Any such statement of costs, or amendments thereto, shall be a public record and be available for inspection at any time in behalf of any board of county commissioners.
SDCL 28-13-31