All taxes assessed, together with any percentage imposed for delinquency and cost of collection, shall continue liens on the property assessed; every tax on personal property shall also be a lien upon the real property of the owner thereof. The lien provided for in this section shall attach as of the first Monday in January of each year, and may be enforced by actions in any court of competent jurisdiction to foreclose such liens, or by a sale of the property affected and the execution and delivery of all necessary certificates and deeds therefor, under such regulations as are now prescribed by Statutes of Arizona for the foreclosure and collection of tax liens, or under such regulations for the foreclosure and collection of tax liens, as may hereafter be prescribed by the Council by ordinance, power to prescribe which regulations is hereby given and vested in said Council. Provided, however, that when real estate is offered for sale for City taxes due thereon, and there is no bidder therefor, the same shall be struck off and sold to the City, in like case and in like manner and with like effect and with like right of redemption, as it may be struck off and sold to the State when offered for sale for State and county taxes; and the Council shall have the power to provide for the procedure to be followed in such sales to the City and redemption thereafter.