Section 11-420. Lands held for public use; right of sale

Whenever the city
  shall become vested with the title to lands by virtue of  a  foreclosure
  proceeding  brought  pursuant  to  the  provisions of this chapter, such
  lands shall, unless actually used for other than municipal purposes,  be
  deemed  to  be held by the city for a public use but for a period of not
  more than three years from the date of the final judgment. The  city  is
  hereby  authorized  to sell and convey such lands in the manner provided
  by law for the sale and conveyance of other real property held and owned
  by the city and not otherwise.