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---
type: "Bill"
title: "Civil rights; public records; public body records, documents, or information disclosable under freedom of information act; exempt critical energy infrastructure and cybersecurity-related information. Amends secs. 2 & 13 of 1976 PA 442 (MCL 15.232 & 15.243)."
description: "Civil rights; public records; public body records, documents, or information disclosable under freedom of information act; exempt critical energy infrastructure and cybersecurity-related information. Amends secs. 2 & 13 of 1976 PA 442 (MCL 15.232 & 15.243)."
jurisdiction: "us/states/mi"
legislature: "Michigan Legislature"
session: "2017-2018"
identifier: "HB 4973"
citation: "Michigan HB 4973 (2017-2018)"
classification: ["bill"]
subjects: ["Civil rights: public records"]
status: "enacted"
primary_sponsors: []
version_count: 5
action_count: 30
vote_count: 3
first_action: "2017-09-19T04:00:00+00:00"
last_action: "2018-03-20T04:00:00+00:00"
source: "openstates"
source_identifier: "ocd-bill/c648b403-c109-46bc-9dd8-0fa5ce69862c"
source_url: "http://legislature.mi.gov/doc.aspx?2017-HB-4973"
source_hash: "ee9a18cdaf94ac1a73bae2158d98e4d8f9cca64af5d6ba9b509b5ecf0accb2d3"
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 HB 4973 (2017-2018) — Civil rights; public records; public body records, documents, or information disclosable under freedom of information act; exempt critical energy infrastructure and cybersecurity-related information. Amends secs. 2 & 13 of 1976 PA 442 (MCL 15.232 & 15.243).
## 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](http://www.legislature.mi.gov/documents/2017-2018/billengrossed/House/htm/2017-HEBH-4973.htm)
2. **As Passed by the Senate** (committee substitute) — [source](http://www.legislature.mi.gov/documents/2017-2018/billengrossed/House/htm/2017-HEBS-4973.htm)
3. **House Concurred Bill** (committee substitute) — [source](http://www.legislature.mi.gov/documents/2017-2018/billconcurred/House/htm/2017-HCB-4973.htm)
4. **House Introduced Bill** (committee substitute) — [source](http://www.legislature.mi.gov/documents/2017-2018/billintroduced/House/htm/2017-HIB-4973.htm)
5. **Public Act** (committee substitute) — [source](http://www.legislature.mi.gov/documents/2017-2018/publicact/htm/2018-PA-0068.htm)
## Votes
- passed; given immediate effect Roll Call # 327 Yeas 101 Nays 5 — **1015** (pass) · lower
- Roll Call # 129 Yeas 104 Nays 4 — **1044** (pass) · lower
- PASSED; GIVEN IMMEDIATE EFFECT ROLL CALL # 124 YEAS 36 NAYS 0 EXCUSED 2 NOT VOTING 0 — **360** (pass) · upper
## Sponsors
- 61 — cosponsor (person)
- Brandt Iden — cosponsor (person)
## Timeline
The legislative action history — every referral, reading, and vote.
- **2017-09-19T04:00:00+00:00** introduced by Representative Brandt Iden `introduction`
- **2017-09-19T04:00:00+00:00** read a first time `reading-1`
- **2017-09-19T04:00:00+00:00** referred to Committee on Communications and Technology `referral-committee`
- **2017-09-20T04:00:00+00:00** bill electronically reproduced 09/19/2017
- **2017-10-17T04:00:00+00:00** reported with recommendation without amendment `committee-passage`
- **2017-10-17T04:00:00+00:00** referred to second reading
- **2017-10-24T04:00:00+00:00** read a second time `reading-2`
- **2017-10-24T04:00:00+00:00** placed on third reading
- **2017-10-25T04:00:00+00:00** read a third time `reading-3`
- **2017-10-25T04:00:00+00:00** passed; given immediate effect Roll Call # 327 Yeas 101 Nays 5 `passage`
- **2017-10-25T04:00:00+00:00** transmitted
- **2017-10-31T04:00:00+00:00** REFERRED TO COMMITTEE ON ELECTIONS AND GOVERNMENT REFORM `referral-committee`
- **2018-02-27T05:00:00+00:00** REPORTED FAVORABLY WITHOUT AMENDMENT `committee-passage`
- **2018-02-27T05:00:00+00:00** COMMITTEE RECOMMENDED IMMEDIATE EFFECT
- **2018-02-27T05:00:00+00:00** REFERRED TO COMMITTEE OF THE WHOLE `referral-committee`
- **2018-02-28T05:00:00+00:00** REPORTED BY COMMITTEE OF THE WHOLE FAVORABLY WITH SUBSTITUTE S-1 `committee-passage`
- **2018-02-28T05:00:00+00:00** SUBSTITUTE S-1 CONCURRED IN
- **2018-02-28T05:00:00+00:00** PLACED ON ORDER OF THIRD READING WITH SUBSTITUTE S-1
- **2018-03-01T05:00:00+00:00** PASSED; GIVEN IMMEDIATE EFFECT ROLL CALL # 124 YEAS 36 NAYS 0 EXCUSED 2 NOT VOTING 0 `passage`
- **2018-03-01T05:00:00+00:00** INSERTED FULL TITLE
- **2018-03-01T05:00:00+00:00** returned from Senate with substitute S-1 with immediate effect and full title
- **2018-03-01T05:00:00+00:00** laid over one day under the rules
- **2018-03-06T05:00:00+00:00** Senate substitute S-1 concurred in
- **2018-03-06T05:00:00+00:00** Roll Call # 129 Yeas 104 Nays 4
- **2018-03-06T05:00:00+00:00** full title agreed to
- **2018-03-06T05:00:00+00:00** bill ordered enrolled
- **2018-03-13T04:00:00+00:00** presented to the Governor 3/8/2018 @ 2:10 PM `executive-receipt`
- **2018-03-20T04:00:00+00:00** approved by the Governor 3/19/2018 @ 11:35 AM `executive-signature`
- **2018-03-20T04:00:00+00:00** filed with Secretary of State 3/19/2018 @ 1:06 PM
- **2018-03-20T04:00:00+00:00** assigned PA 68'18 with immediate effect
## Source
OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/c648b403-c109-46bc-9dd8-0fa5ce69862c`. Confidence: reported (aggregated from official Michigan legislature records).