(2) The part withdrawn pursuant to subsection (1) of this section is not relieved from liabilities and indebtedness previously contracted by the district. For the purposes of paying the liabilities and indebtedness of the district, property in the part withdrawn shall continue to be subject to assessment and taxation uniformly with property in the area remaining in the district. The city of which it became a part shall, however, assume such obligations if the obligations assumed do not bring the total of the city’s obligations above any applicable limitations prescribed by statute. When the city assumes the obligations it shall be liable to the district for one of the following, at the option of the city:

(a) The amount of taxes that otherwise would be extended each year for the obligations against the property in the part withdrawn; or

(b) Payment annually, as the bonds of the district that were outstanding on the effective date of the withdrawal mature, of the same proportion of the outstanding bonds, and the interest on the bonds, as the assessed valuation of the part withdrawn bears to the assessed valuation of the entire district on the effective date of the withdrawal. After the city agrees to make payments under this paragraph, neither the city nor the part withdrawn shall be charged by the district with any future liabilities, obligations or functions of the district. [Amended by 1955 c.471 §2; 1957 c.401 §1; 1963 c.347 §2; 1965 c.509 §2; 1967 c.624 §17; 1985 c.702 §13; 2013 c.277 §1]