Requiring a tax collector to withhold from tax sale certain real property designated by a county or municipal corporation for foreclosure and sale under a certain process; authorizing a county or municipal corporation to initiate an in rem foreclosure and sale of certain real property for delinquent taxes; authorizing a county or municipal corporation to enact laws authorizing in rem foreclosure and sale of certain real property; authorizing the county or municipal corporation to commence an in rem foreclosure action; etc.