The following may adopt the provisions of IC 8-4-1 for condemning real estate:
However, nothing in this section contained shall be deemed or held to authorize such entities to condemn for any purpose that is not a public use authorized by its charter, but such entity adopting the provisions of that chapter shall not condemn more, or for any purpose than as authorized as a public use by its charter; neither shall such entity be deemed to have surrendered or abandoned its charter by condemning real estate as authorized in this section.
IC 8-3-5-1