Ind. Code § 8-1-13-41

Sec. 41. Whenever, upon the investigation made under this chapter, the commission finds any regulations, measurements, practices, acts, or services are unjust, unreasonable, unwholesome, unsanitary, unsafe, insufficient, preferential, unjustly discriminatory, or otherwise in violation of this chapter, or finds that any service is inadequate or that any service which can be reasonably demanded cannot be obtained, the commission shall determine and by order fix just and reasonable measurements, regulations, acts, practices, or service to be furnished, imposed, observed, and followed in the future in lieu of those found to be unjust, unreasonable, unwholesome, unsanitary, unsafe, insufficient, preferential, unjustly discriminatory, inadequate, or otherwise in violation of this chapter. In addition, the commission shall make other orders concerning the measurement, regulation, act, practice, or service as are just and reasonable.