The aforesaid agreement shall provide for the delivery of possession to such person upon the execution thereof and the receipt of the required first payment, and such person shall have the right to retain possession of the property unless and until he shall default in one installment payment or shall fail to pay the current taxes for any year as required by the agreement. Upon default of either or both of said payments the political subdivision shall have the right to repossess said property in the manner provided by the agreement specified in section two of this act,¹ or by the entry of a judgment in ejectment upon affidavit of default and the issuance of a writ of habere facias possessionem in due form according to law. The agreement shall further provide for the conveyance of said property to the person with whom the agreement is entered into, upon final payment of the total amount of said costs, taxes, municipal claims, penalties and interest, as aforesaid, and the payment of all current taxes, as aforesaid, and the title so conveyed shall be free and clear of all tax and municipal claims, but shall not be discharged from any other liens not discharged by the tax sale.