(1) In case an area lies within 10 miles of the boundaries of more than one city, such area shall be deemed to be within the boundaries of the authority embracing such area which was first established, all priorities to be determined on the basis of the time of the issuance of the aforesaid certificates by the secretary of state.
(2) No housing authority shall operate in any area in which an authority already established is operating without the consent by resolution of the authority already operating therein.