No tax for the maintenance of public free schools voted in any independent school district and no tax for the maintenance of a junior college voted by a junior college district, nor any bonds voted in any such district, but unissued, shall be abrogated, cancelled or invalidated by change of any kind in the boundaries thereof. After any change in boundaries, the governing body of any such district, without the necessity of an additional election, shall have the power to assess, levy and collect ad valorem taxes on all taxable property within the boundaries of the district as changed, for the purposes of the maintenance of public free schools or the maintenance of a junior college, as the case may be, and the payment of principal of and interest on all bonded indebtedness outstanding against, or attributable, adjusted or allocated to, such district or any territory therein, in the amount, at the rate, or not to exceed the rate, and in the manner authorized in the district prior to the change in its boundaries, and further in accordance with the laws under which all such bonds, respectively, were voted; and such governing body also shall have the power, without the necessity of an additional election, to sell and deliver any unissued bonds voted in the district prior to any such change in boundaries, and to assess, levy and collect ad valorem taxes on all taxable property in the district as changed, for the payment of principal of and interest on such bonds in the manner permitted by the laws under which such bonds were voted. In those instances where the boundaries of any such independent school district are changed by the annexation of, or consolidation with, one or more whole school districts, the taxes to be levied for the purposes hereinabove authorized may be in the amount or at not to exceed the rate theretofore voted in the district having at the time of such change the greatest scholastic population according to the latest scholastic census and only the unissued bonds of such district voted prior to such change, may be subsequently sold and delivered and any voted, but unissued, bonds of other school districts involved in such annexation or consolidation shall not thereafter be issued.