Section 15-0907. Services of notice, order or direction

Whenever  this  article  provides  for  or authorizes the service of a
  notice, order or direction upon a licensee or applicant for  a  license,
  or  upon  any  other  person,  and  does  not  provide for the manner of
  service, and no different time is provided, such  service  may  be  made
  either  personally or in the manner provided by law for the service of a
  summons or by mailing a copy  of  the  same  by  registered  mail  in  a
  postpaid  wrapper  addressed  to the licensee or applicant, or any other
  person, at the address given  in  the  application  or  as  subsequently
  communicated  to  the  department  in  writing, or at the project works.
  Such service may be made upon a municipal corporation either  personally
  as  above  provided  or  by  mailing  a  copy of the same in like manner
  addressed to the mayor of the city or village or the supervisor  of  the
  town.  Service  upon  unknown owners shall be made by publication in the
  manner provided by law for service of a summons upon unknown parties.