If a municipality has determined to acquire an existing plant in the manner provided in s. 197.02, and the public utility owning the plant has consented to the taking over of the plant by the municipality by acceptance of an indeterminate permit as provided in s. 196.54 (4), or, in case the public utility has not waived or consented to the taking, if a jury acting under s. 197.02 has found that a necessity exists for the taking of the plant, the municipality shall give speedy notice to the public utility and to the commission of the municipality’s determination and of the utility’s consent or the jury’s finding.