(a) A service area in a newly incorporated municipality shall be integrated into the municipality within two years after the date of incorporation. On integration the municipality succeeds to all the rights, powers, duties, assets, and liabilities of the service area. On integration all property in the service area subject to taxation to pay the principal and interest on bonds at the time of integration remains subject to taxation for that purpose.
(b) After integration, the municipality may exercise in a former service area all of the rights and powers exercised by the service area at the time of integration, and, as successor to the service area, may levy and collect special charges, taxes, or assessments to amortize bonded indebtedness incurred by the service area or by a municipality in which the service area was formerly located.