Notice of hearing the application, petition, or complaint shall be given by publishing the same once each week for a period of three weeks preceding the hearing in some legal newspaper of the county to be designated in the order of the court as most likely to give notice to the persons interested. If no legal newspaper is published in such county, a notice shall be given by publishing the same in some legal newspaper in the state in an adjoining county and designated by the court as most likely to give notice to the persons interested and also by posting notice of such hearing at the front door of the courthouse of the county wherein the action is pending.
SDCL 21-51-7