---
type: "Bill"
title: "Greenhouse Gas Emission Reduction Measures"
description: "The length of the bill summary for this bill requires it to be published on a separate page here:"
jurisdiction: "us/states/co"
legislature: "Colorado General Assembly"
session: "2023A"
identifier: "SB 23-016"
citation: "Colorado SB 23-016 (2023A)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: ["Chris Hansen", "Emily Sirota", "Karen McCormick"]
version_count: 14
action_count: 26
vote_count: 8
first_action: "2023-01-10T07:00:00+00:00"
last_action: "2023-05-11T06:00:00+00:00"
source: "openstates"
source_identifier: "ocd-bill/ba7b28aa-1f5a-4e09-adbe-933f4a623a2e"
source_url: "https://leg.colorado.gov/bills/sb23-016"
source_hash: "495208b26734c4edb6fecbd026819b6e7303d1e25e843790dd1741bf642a8e76"
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-co"]
---

# Colorado SB 23-016 (2023A) — Greenhouse Gas Emission Reduction Measures

The length of the bill summary for this bill requires it to be published on a separate page here:

## Version chain

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

1. **Committee Amendment** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/2023a_sb016_h_app_003.pdf)
2. **Engrossed (04/13/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_016_eng.pdf)
3. **Final Act (05/10/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_016_enr.pdf)
4. **Introduced (01/10/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_016_01.pdf)
5. **PA1 (01/26/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_016_s_tra_01.pdf)
6. **PA2 (02/22/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_016_s_tra_fin_01.pdf)
7. **PA3 (04/06/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_016_s_tra_fin_app_01.pdf)
8. **PA4 (04/21/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_016_h_ene_01.pdf)
9. **PA5 (04/25/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_016_h_ene_fin_01.pdf)
10. **PA6 (04/26/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_016_h_ene_fin_app_01.pdf)
11. **Reengrossed (04/14/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_016_ren.pdf)
12. **Rerevised (04/29/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_016_rer.pdf)
13. **Revised (04/26/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_016_rev.pdf)
14. **Signed Act (05/11/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/2023a_016_signed.pdf)

## Votes

- BILL — **44–19** (pass) · lower
- REPASS — **44–19** (pass) · lower
- REPASS — **23–12** (pass) · upper
- ADOPT — **45–18** (pass) · lower
- BYD SCP — **45–17** (pass) · lower
- ADOPT CCR — **35–0** (pass) · upper
- BILL — **22–10** (pass) · upper
- NOT CONCUR APPT CC — **35–0** (pass) · upper

## Sponsors

- Chris Hansen — primary (person)
- Emily Sirota — primary (person)
- Karen McCormick — primary (person)

## Timeline

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

- **2023-05-11T06:00:00+00:00** Governor Signed `executive-signature`
- **2023-05-10T06:00:00+00:00** Sent to the Governor `executive-receipt`
- **2023-05-10T06:00:00+00:00** Signed by the President of the Senate
- **2023-05-09T06:00:00+00:00** Signed by the Speaker of the House
- **2023-05-08T06:00:00+00:00** Senate Consideration of First Conference Committee Report result was to Adopt Committee Report - Repass
- **2023-05-08T06:00:00+00:00** House Consideration of First Conference Committee Report result was to Adopt Committee Report - Repass
- **2023-05-07T06:00:00+00:00** First Conference Committee Result was to Adopt Rerevised w/ Amendments
- **2023-05-06T06:00:00+00:00** First Conference Committee Result was to Adopt Rerevised w/ Amendments
- **2023-05-04T06:00:00+00:00** Senate Considered House Amendments - Result was to Not Concur - Request Conference Committee
- **2023-05-03T06:00:00+00:00** Senate Considered House Amendments - Result was to Laid Over Daily
- **2023-05-03T06:00:00+00:00** Senate Considered House Amendments - Result was to Laid Over Daily
- **2023-04-29T06:00:00+00:00** House Third Reading Passed - No Amendments `passage, reading-3`
- **2023-04-27T06:00:00+00:00** House Third Reading Laid Over Daily - No Amendments
- **2023-04-26T06:00:00+00:00** House Second Reading Special Order - Passed with Amendments - Committee, Floor
- **2023-04-26T06:00:00+00:00** House Committee on Appropriations Refer Amended to House Committee of the Whole `committee-passage, referral-committee`
- **2023-04-24T06:00:00+00:00** House Committee on Finance Refer Amended to Appropriations `referral-committee`
- **2023-04-20T06:00:00+00:00** House Committee on Energy & Environment Refer Amended to Finance `referral-committee`
- **2023-04-17T06:00:00+00:00** Introduced In House - Assigned to Energy & Environment `introduction`
- **2023-04-14T06:00:00+00:00** Senate Third Reading Passed - No Amendments `passage, reading-3`
- **2023-04-13T06:00:00+00:00** Senate Second Reading Passed with Amendments - Committee, Floor `reading-2`
- **2023-04-12T06:00:00+00:00** Senate Second Reading Laid Over Daily - No Amendments
- **2023-04-11T06:00:00+00:00** Senate Second Reading Laid Over Daily - No Amendments
- **2023-04-06T06:00:00+00:00** Senate Committee on Appropriations Refer Amended to Senate Committee of the Whole `committee-passage, referral-committee`
- **2023-02-21T07:00:00+00:00** Senate Committee on Finance Refer Amended to Appropriations `referral-committee`
- **2023-01-25T07:00:00+00:00** Senate Committee on Transportation & Energy Refer Amended to Finance `referral-committee`
- **2023-01-10T07:00:00+00:00** Introduced In Senate - Assigned to Transportation & Energy `introduction`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/ba7b28aa-1f5a-4e09-adbe-933f4a623a2e`. Confidence: reported (aggregated from official Colorado legislature records).