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---
type: "Bill"
title: "Advanced transmission technologies."
description: "Defines \"advanced transmission technologies\" as software or hardware technologies that increase the capacity, efficiency, reliability, or safety of an existing or new electric transmission facility. Provides that in any integrated resource plan (IRP) filed with the Indiana utility regulatory commission (IURC) after December 31, 2025, an electric utility that owns or operates a transmission or distribution system must include a description of the potential use of, or investment in, one or more advanced transmission technologies to enable the electric utility to safely, reliably, efficiently, and cost effectively meet electric system demand. Provides that in any IRP filed with the IURC after December 31, 2029, an electric utility that owns or operates a transmission or distribution system must include a description of the electric utility's transmission and distribution systems, as specified by the IURC. Requires the IURC to conduct a study to evaluate the potential use or deployment of advanced transmission technologies by public utilities. Sets forth specific topics that the IURC must evaluate as part of the study. Requires the IURC to include in its 2026 annual report the commission's findings with respect to the topics evaluated in the study. Provides that advanced transmission technologies qualify as eligible transmission, distribution, and storage system improvements for purposes of the statute that authorizes a public utility to recover eligible costs incurred in connection with investments made in such improvements."
jurisdiction: "us/states/in"
legislature: "Indiana General Assembly"
session: "2025"
identifier: "SB 422"
citation: "Indiana SB 422 (2025)"
classification: ["bill"]
subjects: ["AGENCIES; Utility Regulatory Commission (IURC)", "TECHNOLOGY; Generally", "UTILITIES; Electric", "UTILITIES; Generally"]
status: "enacted"
primary_sponsors: ["Edmond Soliday", "Eric Koch", "Gary Byrne", "Jean Leising"]
version_count: 4
action_count: 22
vote_count: 2
first_action: "2025-01-13"
last_action: "2025-03-31"
source: "openstates"
source_identifier: "ocd-bill/794df9d2-1238-4ee6-bcd3-a7dc4bba0f43"
source_url: "https://api.iga.in.gov/2025/bills/sb0422"
source_hash: "1c04601da0a4cf1aaf28cf2425298c1bc8b9427790563260274301c7dd3342bc"
vintage: "2026-07-01"
source_snapshot: "https://data.openstates.org/daily/2026-07-01/public.pgdump"
retrieved_at: "2026-07-06"
confidence: "reported"
tags: ["legislation", "bill", "us-in"]
---
# Indiana SB 422 (2025) — Advanced transmission technologies.
Defines "advanced transmission technologies" as software or hardware technologies that increase the capacity, efficiency, reliability, or safety of an existing or new electric transmission facility. Provides that in any integrated resource plan (IRP) filed with the Indiana utility regulatory commission (IURC) after December 31, 2025, an electric utility that owns or operates a transmission or distribution system must include a description of the potential use of, or investment in, one or more advanced transmission technologies to enable the electric utility to safely, reliably, efficiently, and cost effectively meet electric system demand. Provides that in any IRP filed with the IURC after December 31, 2029, an electric utility that owns or operates a transmission or distribution system must include a description of the electric utility's transmission and distribution systems, as specified by the IURC. Requires the IURC to conduct a study to evaluate the potential use or deployment of advanced transmission technologies by public utilities. Sets forth specific topics that the IURC must evaluate as part of the study. Requires the IURC to include in its 2026 annual report the commission's findings with respect to the topics evaluated in the study. Provides that advanced transmission technologies qualify as eligible transmission, distribution, and storage system improvements for purposes of the statute that authorizes a public utility to recover eligible costs incurred in connection with investments made in such improvements.
## Version chain
The bill's text revisions, in order — the diff chain from filing to enrollment.
1. **Enrolled Senate Bill (S)** (committee substitute) — [source](https://iga.in.gov/pdf-documents/124/2025/senate/bills/SB0422/SB0422.04.ENRH.pdf)
2. **Introduced Senate Bill (S)** (committee substitute) — [source](https://iga.in.gov/pdf-documents/124/2025/senate/bills/SB0422/SB0422.01.INTR.pdf)
3. **Senate Bill (H)** (committee substitute) — [source](https://iga.in.gov/pdf-documents/124/2025/senate/bills/SB0422/SB0422.02.COMS.pdf)
4. **Senate Bill (S)** (committee substitute) — [source](https://iga.in.gov/pdf-documents/124/2025/senate/bills/SB0422/SB0422.03.COMH.pdf)
## Votes
- SB 422 - Koch - 3rd Reading — **490** (pass) · upper
- SB 422 - Soliday - 3rd Reading — **960** (pass) · lower
## Sponsors
- Edmond Soliday — primary (person)
- Eric Koch — primary (person)
- Gary Byrne — primary (person)
- Jean Leising — primary (person)
- Daryl Schmitt — coauthor (person)
- Jim Pressel — cosponsor (person)
- Matt Pierce — cosponsor (person)
## Timeline
The legislative action history — every referral, reading, and vote.
- **2025-01-13** Authored by Senator Koch
- **2025-01-13** First reading: referred to Committee on Utilities `reading-1, referral-committee`
- **2025-01-28** Senator Schmitt added as coauthor
- **2025-01-30** Committee report: amend do pass, adopted `committee-passage`
- **2025-02-03** Second reading: ordered engrossed `reading-2`
- **2025-02-04** Senator Byrne added as second author
- **2025-02-05** Referred to the House `referral`
- **2025-02-04** Third reading: passed; Roll Call 74: yeas 49, nays 0 `passage, reading-3, reading-3`
- **2025-02-04** Senator Leising added as third author
- **2025-02-04** House sponsor: Representative Soliday
- **2025-03-03** First reading: referred to Committee on Utilities, Energy and Telecommunications `reading-1, referral-committee`
- **2025-03-10** Committee report: do pass, adopted `committee-passage`
- **2025-03-13** Representative Pierce M added as cosponsor
- **2025-03-13** Representative Pressel added as cosponsor
- **2025-03-13** Second reading: ordered engrossed `reading-2`
- **2025-03-17** Returned to the Senate without amendments `receipt`
- **2025-03-17** Third reading: passed; Roll Call 270: yeas 96, nays 0 `passage, reading-3, reading-3`
- **2025-03-19** Signed by the Speaker `passage`
- **2025-03-18** Signed by the President Pro Tempore `passage`
- **2025-03-20** Signed by the President of the Senate `passage`
- **2025-03-31** Public Law 10 `became-law`
- **2025-03-31** Signed by the Governor `executive-signature`
## Source
OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/794df9d2-1238-4ee6-bcd3-a7dc4bba0f43`. Confidence: reported (aggregated from official Indiana legislature records).