Legislation: batch C — MO MS MT NC ND NE NH NJ NM NV

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

legislation/us/states/mt/2025/hb-586.md

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+---
+type: "Bill"
+title: "Generally revise child safety restraint system laws"
+description: "Generally revise child safety restraint system laws"
+jurisdiction: "us/states/mt"
+legislature: "Montana Legislature"
+session: "2025"
+identifier: "HB 586"
+citation: "Montana HB 586 (2025)"
+classification: ["bill"]
+subjects: ["Minors", "Traffic Regulations", "Transportation"]
+status: "enacted"
+primary_sponsors: ["Marc Lee"]
+version_count: 56
+action_count: 41
+vote_count: 10
+first_action: "2025-01-18T16:16:15+00:00"
+last_action: "2025-05-19T22:27:02+00:00"
+source: "openstates"
+source_identifier: "ocd-bill/6a05e890-669d-4bc1-8c8f-966cabf2495f"
+source_url: "https://bills.legmt.gov/#/laws/bill/2/LC4324?open_tab=sum"
+source_hash: "9e691d2b1bd0b612f58d3c5343d523acfb54c40932aa3553c91b849f21265b1a"
+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-mt"]
+---
+
+# Montana HB 586 (2025) — Generally revise child safety restraint system laws
+
+## Version chain
+
+The bill's text revisions, in order — the diff chain from filing to enrollment.
+
+1. **HB0586.001.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=289614)
+2. **HB0586.002.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=294971)
+3. **HB0586.002.001_Amendments-in-Context_final-not condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=294973)
+4. **HB0586_1(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=284443)
+5. **HB0586_1(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=285035)
+6. **HB0586_1(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=291069)
+7. **HB0586_1(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=291070)
+8. **HB0586_1(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=291071)
+9. **HB0586_1(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=291072)
+10. **HB0586_1.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=284442)
+11. **HB0586_2(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=291074)
+12. **HB0586_2(10).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=298286)
+13. **HB0586_2(11).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=298287)
+14. **HB0586_2(12).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=298288)
+15. **HB0586_2(13).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=298289)
+16. **HB0586_2(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=291075)
+17. **HB0586_2(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=291076)
+18. **HB0586_2(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=291077)
+19. **HB0586_2(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=291078)
+20. **HB0586_2(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=291079)
+21. **HB0586_2(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293842)
+22. **HB0586_2(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293999)
+23. **HB0586_2(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=295636)
+24. **HB0586_2.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=291073)
+25. **HB0586_3(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=298291)
+26. **HB0586_3(10).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=304165)
+27. **HB0586_3(11).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=314112)
+28. **HB0586_3(12).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=314113)
+29. **HB0586_3(13).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=314114)
+30. **HB0586_3(14).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=314115)
+31. **HB0586_3(15).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=314445)
+32. **HB0586_3(16).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=314451)
+33. **HB0586_3(17).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=314453)
+34. **HB0586_3(18).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=314455)
+35. **HB0586_3(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=298292)
+36. **HB0586_3(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=298293)
+37. **HB0586_3(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=298362)
+38. **HB0586_3(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=298363)
+39. **HB0586_3(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=298364)
+40. **HB0586_3(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=298366)
+41. **HB0586_3(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=298367)
+42. **HB0586_3(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=298369)
+43. **HB0586_3.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=298290)
+44. **HB0586_X(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=314457)
+45. **HB0586_X(10).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=325079)
+46. **HB0586_X(11).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=327133)
+47. **HB0586_X(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=314459)
+48. **HB0586_X(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=314768)
+49. **HB0586_X(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=314769)
+50. **HB0586_X(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=317198)
+51. **HB0586_X(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=320747)
+52. **HB0586_X(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=323302)
+53. **HB0586_X(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=323303)
+54. **HB0586_X(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=323304)
+55. **HB0586_X.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=314456)
+56. **LC4324.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=281902)
+
+## Votes
+
+- Do Concur — **63–37** (pass) · lower
+- Do Pass — **80–19** (pass) · lower
+- Rerefer to Transportation-Tempel — **32–18** (pass) · upper
+- Do Concur — **28–22** (pass) · upper
+- be_concurred_in_as_amended — **7–1** (pass) · upper
+- Do Concur — **30–20** (pass) · upper
+- Do Concur — **73–26** (pass) · lower
+- Do Pass — **84–14** (pass) · lower
+- be_concurred_in — **8–0** (pass) · upper
+- do_pass_as_amended — **12–2** (pass) · lower
+
+## Sponsors
+
+- Marc Lee — primary (person)
+
+## Timeline
+
+The legislative action history — every referral, reading, and vote.
+
+- **2025-01-18T16:16:15+00:00** (LC) Drafter Assigned
+- **2025-02-11T20:05:32+00:00** (LC) Draft in Legal Review
+- **2025-02-11T22:36:48+00:00** (LC) Draft in Edit
+- **2025-02-13T16:23:28+00:00** (LC) Draft in Input/Proofing
+- **2025-02-13T18:51:35+00:00** (LC) Draft in Final Drafter Review
+- **2025-02-13T19:49:04+00:00** (LC) Draft in Assembly
+- **2025-02-17T14:02:59+00:00** (LC) Draft Ready for Delivery
+- **2025-02-18T16:44:17+00:00** (LC) Draft Delivered to Requester
+- **2025-02-19T21:48:17+00:00** (H) Introduced
+- **2025-02-20T18:56:10+00:00** (H) Referred to Committee - (H) Transportation `referral-committee`
+- **2025-02-20T19:51:28+00:00** (H) First Reading `reading-1`
+- **2025-02-21T21:12:06+00:00** (H) Hearing - (H) Transportation
+- **2025-03-01T01:01:41+00:00** (H) Committee Executive Action--Bill Passed as Amended - (H) Transportation `committee-passage`
+- **2025-03-01T22:45:00+00:00** (H) Committee Report--Bill Passed as Amended - (H) Transportation `committee-passage`
+- **2025-03-05T23:45:00+00:00** (H) 2nd Reading Passed `reading-2, reading-2`
+- **2025-03-07T16:54:00+00:00** (H) 3rd Reading Passed `passage, reading-3`
+- **2025-03-07T18:00:00+00:00** (H) Transmitted to Senate
+- **2025-03-14T23:06:17+00:00** (S) First Reading `reading-1`
+- **2025-03-14T23:32:00+00:00** (S) Referred to Committee - (S) Highways and Transportation `referral-committee`
+- **2025-03-17T15:48:58+00:00** (S) Hearing - (S) Highways and Transportation
+- **2025-03-19T22:30:01+00:00** (S) Committee Executive Action--Bill Concurred - (S) Highways and Transportation
+- **2025-03-20T21:30:00+00:00** (S) Committee Report--Bill Concurred - (S) Highways and Transportation
+- **2025-03-20T21:31:00+00:00** (S) Rereferred to Committee - (S) Highways and Transportation `referral-committee, referral-committee`
+- **2025-03-24T22:01:40+00:00** (S) Committee Executive Action--Bill Concurred as Amended - (S) Highways and Transportation
+- **2025-03-25T19:43:00+00:00** (S) Committee Report--Bill Concurred as Amended - (S) Highways and Transportation
+- **2025-04-02T19:00:00+00:00** (S) Scheduled for 2nd Reading `reading-2`
+- **2025-04-02T21:36:00+00:00** (S) 2nd Reading Concurred `reading-2, reading-2`
+- **2025-04-03T19:00:00+00:00** (S) Scheduled for 3rd Reading `reading-3`
+- **2025-04-03T19:36:00+00:00** (S) 3rd Reading Concurred `passage, reading-3`
+- **2025-04-03T21:27:52+00:00** (S) Returned to House with Amendments
+- **2025-04-16T19:00:00+00:00** (H) Scheduled for 2nd Reading `reading-2`
+- **2025-04-16T20:33:00+00:00** (H) 2nd Reading Senate Amendments Concurred `amendment-amendment, amendment-passage, reading-2, reading-2`
+- **2025-04-17T19:00:00+00:00** (H) Scheduled for 3rd Reading `reading-3`
+- **2025-04-17T22:00:00+00:00** (H) 3rd Reading Passed as Amended by Senate `passage, passage, reading-3, reading-3`
+- **2025-04-18T20:02:19+00:00** (H) Sent to Enrolling
+- **2025-04-23T14:07:40+00:00** (H) Returned from Enrolling
+- **2025-05-02T17:00:20+00:00** (H) Signed by Speaker `passage`
+- **2025-05-06T20:00:07+00:00** (S) Signed by President `passage`
+- **2025-05-07T15:03:52+00:00** (H) Transmitted to Governor `executive-receipt`
+- **2025-05-13T18:51:00+00:00** (H) Signed by Governor `executive-signature`
+- **2025-05-19T22:27:02+00:00** Chapter Number Assigned `became-law`
+
+## Source
+
+OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/6a05e890-669d-4bc1-8c8f-966cabf2495f`. Confidence: reported (aggregated from official Montana legislature records).
+