---
type: "Bill"
title: "Income tax credits; relating to credits for production of electricity by zero-emission facilities; correcting inadvertent omission of specified date. Effective date."
description: "Income tax credits; relating to credits for production of electricity by zero-emission facilities; correcting inadvertent omission of specified date. Effective date."
jurisdiction: "us/states/ok"
legislature: "Oklahoma Legislature"
session: "2020"
identifier: "SB 475"
citation: "Oklahoma SB 475 (2020)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: ["Lepak", "Quinn"]
version_count: 6
action_count: 22
vote_count: 1
first_action: "2019-02-04"
last_action: "2019-05-02"
source: "openstates"
source_identifier: "ocd-bill/effaf7c4-104c-49cc-9042-a78ad87e8b2d"
source_url: "http://www.oklegislature.gov/BillInfo.aspx?Bill=SB475&session=2000"
source_hash: "3cc54577fc7fa688d1f3e71e75c92c0ec40f3e056004ac5c7b1d3b79ec3d77bd"
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-ok"]
---

# Oklahoma SB 475 (2020) — Income tax credits; relating to credits for production of electricity by zero-emission facilities; correcting inadvertent omission of specified date. Effective date.

## Version chain

The bill's text revisions, in order — the diff chain from filing to enrollment.

1. **Introduced** (filed) — [source](http://webserver1.lsb.state.ok.us/cf_pdf/2019-20 INT/SB/SB475 INT.PDF)
2. **Engrossed** (committee substitute) — [source](http://webserver1.lsb.state.ok.us/cf_pdf/2019-20 ENGR/SB/SB475 ENGR.PDF)
3. **Enrolled (final version)** (committee substitute) — [source](http://webserver1.lsb.state.ok.us/cf_pdf/2019-20 ENR/SB/SB475 ENR.PDF)
4. **Floor (House)** (committee substitute) — [source](http://webserver1.lsb.state.ok.us/cf_pdf/2019-20 FLR/HFLR/SB475 HFLR.PDF)
5. **Floor (Senate)** (committee substitute) — [source](http://webserver1.lsb.state.ok.us/cf_pdf/2019-20 FLR/SFLR/SB475 SFLR.PDF)
6. **SB475 (3-04-19) (QUINN) RT FA1.PDF** (committee substitute) — [source](http://webserver1.lsb.state.ok.us/cf_pdf/2019-20 FLOOR AMENDMENTS/Senate/SB475 (3-04-19) (QUINN) RT FA1.PDF)

## Votes

- THIRD READING — **44–1** (pass) · upper

## Sponsors

- Lepak — primary (person)
- Quinn — primary (person)

## Timeline

The legislative action history — every referral, reading, and vote.

- **2019-02-04** First Reading `introduction, reading-1`
- **2019-02-04** Authored by Senator Quinn
- **2019-02-05** Second Reading referred to Finance `referral-committee, reading-2`
- **2019-02-12** Reported Do Pass as amended Finance committee; CR filed `committee-passage`
- **2019-02-12** Title stricken
- **2019-03-04** Coauthored by Representative Lepak (principal House author)
- **2019-03-13** General Order, Amended
- **2019-03-13** Title restored
- **2019-03-13** Measure passed: Ayes: 44 Nays: 1 `passage`
- **2019-03-13** Referred for engrossment
- **2019-03-14** Engrossed to House `passage`
- **2019-03-14** First Reading `introduction, reading-1`
- **2019-03-19** Second Reading referred to Appropriations and Budget `referral-committee, reading-2`
- **2019-03-28** CR; Do Pass Appropriations and Budget Committee `committee-passage`
- **2019-04-25** General Order
- **2019-04-25** Third Reading, Measure passed: Ayes: 71 Nays: 0 `passage, reading-3`
- **2019-04-25** Signed, returned to Senate
- **2019-04-25** Referred for enrollment
- **2019-04-29** Enrolled, to House
- **2019-04-29** Signed, returned to Senate
- **2019-04-29** Sent to Governor `executive-receipt`
- **2019-05-02** Approved by Governor 05/02/2019 `executive-signature`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/effaf7c4-104c-49cc-9042-a78ad87e8b2d`. Confidence: reported (aggregated from official Oklahoma legislature records).