(1) This part is intended to afford an alternative method for the making of improvements by a municipality, the creation of special improvement districts for central business districts of the various municipalities, the levy of assessments and the issuance of bonds by municipalities, and shall not be so construed as to deprive any municipality of the right to make improvements, create special improvement districts, levy assessments or other special taxes or issue bonds under authority of any other law of this state now in effect or hereafter enacted, including parts 1-4 of this chapter; nevertheless, this part shall constitute full authority for the making of improvements, creation of central business improvement districts, levy of assessments and issuance of bonds under the Local Government Public Obligations Act of 1986, compiled in title 9, chapter 21, to the extent applicable, by such municipalities as act under this part.
(2) No act hereafter passed by the general assembly amending other acts relating to the same subject matter as covered by this part shall be construed to affect the authority to proceed under this part, in the manner provided in this part, unless such future act amends this part and specifically provides that it is to be applicable to proceedings taken and to bonds issued under this part.