To be eligible to recover the reasonable and prudently incurred costs regarding the repair, improvement and replacement of eligible property from a DSIC, a utility shall submit an LTIIP for Commission approval. See 66 Pa.C.S. § 1353 (relating to distribution system improvement charge). The LTIIP must show the acceleration of the replacement of aging infrastructure by the utility and be sufficient to ensure and maintain adequate, efficient, safe, reliable and reasonable service to customers.
52 Pa. Code § 121.1