---
type: "Bill"
title: "Civil procedure: writs; quo warranto; revise applicability for election lawsuits. Amends secs. 4501 & 4545 of 1961 PA 236 (MCL 600.4501 & 600.4545)."
description: "Civil procedure: writs; quo warranto; revise applicability for election lawsuits. Amends secs. 4501 & 4545 of 1961 PA 236 (MCL 600.4501 & 600.4545)."
jurisdiction: "us/states/mi"
legislature: "Michigan Legislature"
session: "2023-2024"
identifier: "SB 591"
citation: "Michigan SB 591 (2023-2024)"
classification: ["bill"]
subjects: ["Civil procedure: remedies", "Civil procedure: writs", "Elections: other", "Elections: presidential electors"]
status: "enacted"
primary_sponsors: ["Mary Cavanagh"]
version_count: 4
action_count: 27
vote_count: 2
first_action: "2023-10-17"
last_action: "2023-12-29"
source: "openstates"
source_identifier: "ocd-bill/7596163a-0b18-4ee4-b0e3-9b9e1e6a1a8b"
source_url: "https://legislature.mi.gov/Bills/Bill?ObjectName=2023-SB-0591"
source_hash: "9eb68cd9b47b3ae2293be93ccae0cc60438a25b75a6c3c038227d4424d4ce61a"
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-mi"]
---

# Michigan SB 591 (2023-2024) — Civil procedure: writs; quo warranto; revise applicability for election lawsuits. Amends secs. 4501 & 4545 of 1961 PA 236 (MCL 600.4501 & 600.4545).

## Version chain

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

1. **As Passed by the House** (committee substitute) — [source](https://legislature.mi.gov/documents/2023-2024/billengrossed/Senate/pdf/2023-SEBH-0591.pdf)
2. **As Passed by the Senate** (committee substitute) — [source](https://legislature.mi.gov/documents/2023-2024/billengrossed/Senate/pdf/2023-SEBS-0591.pdf)
3. **Public Act** (committee substitute) — [source](https://legislature.mi.gov/documents/2023-2024/publicact/pdf/2023-PA-0256.pdf)
4. **Senate Introduced Bill** (committee substitute) — [source](https://legislature.mi.gov/documents/2023-2024/billintroduced/Senate/pdf/2023-SIB-0591.pdf)

## Votes

- passed; given immediate effect Roll Call # 543 Yeas 56 Nays 53 Excused 0 Not Voting 1 — **56–53** (pass) · lower
- PASSED ROLL CALL # 647 YEAS 20 NAYS 18 EXCUSED 0 NOT VOTING 0 — **20–18** (pass) · upper

## Sponsors

- Mary Cavanagh — primary (person)

## Timeline

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

- **2023-11-08** placed on third reading
- **2023-10-17** INTRODUCED BY SENATOR MARY CAVANAGH `introduction`
- **2023-10-17** REFERRED TO COMMITTEE ON ELECTIONS AND ETHICS `referral-committee`
- **2023-10-31** REPORTED FAVORABLY WITH SUBSTITUTE (S-2) `committee-passage`
- **2023-10-31** REFERRED TO COMMITTEE OF THE WHOLE WITH SUBSTITUTE (S-2) `referral-committee`
- **2023-11-01** REPORTED BY COMMITTEE OF THE WHOLE FAVORABLY WITH SUBSTITUTE (S-2) `committee-passage`
- **2023-11-01** SUBSTITUTE (S-2) CONCURRED IN
- **2023-11-01** PLACED ON ORDER OF THIRD READING WITH SUBSTITUTE (S-2)
- **2023-11-02** PASSED ROLL CALL # 647 YEAS 20 NAYS 18 EXCUSED 0 NOT VOTING 0 `passage`
- **2023-11-02** received on 11/02/2023 `introduction`
- **2023-11-02** read a first time `reading-1`
- **2023-11-02** referred to Committee on Elections `referral-committee`
- **2023-11-07** notice given to discharge committee
- **2023-11-08** motion to discharge committee approved
- **2023-11-08** placed on second reading
- **2023-11-08** read a second time `reading-2`
- **2023-11-08** placed on third reading
- **2023-11-09** read a third time `reading-3`
- **2023-11-09** passed; given immediate effect Roll Call # 543 Yeas 56 Nays 53 Excused 0 Not Voting 1 `passage`
- **2023-11-09** inserted full title
- **2023-11-09** returned to Senate
- **2023-11-09** FULL TITLE AGREED TO
- **2023-11-09** ORDERED ENROLLED
- **2023-12-29** PRESENTED TO GOVERNOR 11/21/2023 10:54 AM `executive-receipt`
- **2023-12-29** APPROVED BY GOVERNOR 11/30/2023 12:26 PM `executive-signature`
- **2023-12-29** FILED WITH SECRETARY OF STATE 12/01/2023 11:12 AM
- **2023-12-29** ASSIGNED PA 0256'23

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/7596163a-0b18-4ee4-b0e3-9b9e1e6a1a8b`. Confidence: reported (aggregated from official Michigan legislature records).