204.430. For the purpose of refunding, extending andunifying the whole or any part of any valid outstanding bondedindebtedness payable from the revenues of a sewerage system, anycommon sewer district may issue refunding bonds not exceeding inamount the principal of the outstanding indebtedness to berefunded and the accrued interest to the date of the refundingbonds. The board of trustees of the sewer district shall providefor the payment of interest at not to exceed the same rate andthe principal of the refunding bonds in the same manner and fromthe same source as was provided for the payment of interest onand principal of the bonds to be refunded.
(L. 1967 p. 310 ยง 24)