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---
type: "Bill"
title: "USE/OCC TAX-DATA CENTERS"
description: "Amends the Use Tax Act, the Service Use Tax Act, the Service Occupation Tax Act, and the Retailers' Occupation Tax Act. Creates an exemption for qualified tangible personal property used in the construction or operation of a data center that has been granted a certificate of exemption by the Department of Revenue. Amends the Department of Revenue Law of the Civil Administrative Code of Illinois to add provisions concerning those certificates of exemption. Effective immediately."
jurisdiction: "us/states/il"
legislature: "Illinois General Assembly"
session: "101st"
identifier: "SB 1591"
citation: "Illinois SB 1591 (101st)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: []
version_count: 3
action_count: 93
vote_count: 3
first_action: "2019-02-15"
last_action: "2019-08-02"
source: "openstates"
source_identifier: "ocd-bill/087f384b-bd45-4e07-9904-dae91cf10037"
source_url: "http://ilga.gov/legislation/BillStatus.asp?DocNum=1591&GAID=15&DocTypeID=SB&LegId=118621&SessionID=108&GA=101"
source_hash: "25430c84747f89c290c12f9a47064fe105e0d3d689d933348992b20e6e872568"
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-il"]
---
# Illinois SB 1591 (101st) — USE/OCC TAX-DATA CENTERS
Amends the Use Tax Act, the Service Use Tax Act, the Service Occupation Tax Act, and the Retailers' Occupation Tax Act. Creates an exemption for qualified tangible personal property used in the construction or operation of a data center that has been granted a certificate of exemption by the Department of Revenue. Amends the Department of Revenue Law of the Civil Administrative Code of Illinois to add provisions concerning those certificates of exemption. Effective immediately.
## Version chain
The bill's text revisions, in order — the diff chain from filing to enrollment.
1. **Introduced** (filed) — [source](http://ilga.gov/legislation/fulltext.asp?DocName=10100SB1591&GA=101&SessionId=108&DocTypeId=SB&LegID=118621&DocNum=1591&GAID=15&SpecSess=&Session=&print=true)
2. **Engrossed** (committee substitute) — [source](http://ilga.gov/legislation/fulltext.asp?DocName=10100SB1591eng&GA=101&SessionId=108&DocTypeId=SB&LegID=118621&DocNum=1591&GAID=15&SpecSess=&Session=&print=true)
3. **Enrolled** (enrolled) — [source](http://ilga.gov/legislation/fulltext.asp?DocName=10100SB1591enr&GA=101&SessionId=108&DocTypeId=SB&LegID=118621&DocNum=1591&GAID=15&SpecSess=&Session=&print=true)
## Votes
- Third Reading — **1140** (pass) · lower
- Concurrence — **570** (pass) · upper
- Third Reading — **560** (pass) · upper
## Sponsors
- Ann Gillespie — primary (person)
- Bill Cunningham — cosponsor (person)
- Chapin Rose — cosponsor (person)
- Charles Meier — cosponsor (person)
- Chuck Weaver — cosponsor (person)
- Dan Ugaste — cosponsor (person)
- Daniel Didech — cosponsor (person)
- David McSweeney — cosponsor (person)
- Deanne M. Mazzochi — cosponsor (person)
- Don Harmon — cosponsor (person)
- Grant Wehrli — cosponsor (person)
- Jay Hoffman — cosponsor (person)
- Joe Sosnowski — cosponsor (person)
- John F. Curran — cosponsor (person)
- Joyce Mason — cosponsor (person)
- Julie A. Morrison — cosponsor (person)
- Karina Villa — cosponsor (person)
- Katie Stuart — cosponsor (person)
- Lance Yednock — cosponsor (person)
- Laura M. Murphy — cosponsor (person)
- Linda Holmes — cosponsor (person)
- Mark Batinick — cosponsor (person)
- Mark L. Walker — primary (person)
- Martin J. Moylan — cosponsor (person)
- Mary Edly-Allen — cosponsor (person)
- Michael J. Zalewski — cosponsor (person)
- Michelle Mussman — cosponsor (person)
- Monica Bristow — cosponsor (person)
- Napoleon Harris, III — cosponsor (person)
- Natalie A. Manley — cosponsor (person)
- Nathan D. Reitz — cosponsor (person)
- Pat McGuire — cosponsor (person)
- Sue Rezin — cosponsor (person)
- Terra Costa Howard — cosponsor (person)
- Thomas M. Bennett — cosponsor (person)
- William E. Brady — cosponsor (person)
## Timeline
The legislative action history — every referral, reading, and vote.
- **2019-02-15** Filed with Secretary by Sen. Elgie R. Sims, Jr. `filing`
- **2019-02-15** First Reading `reading-1`
- **2019-02-15** Referred to Assignments `referral-committee`
- **2019-02-20** Added as Chief Co-Sponsor Sen. Linda Holmes
- **2019-02-20** Added as Co-Sponsor Sen. Sue Rezin
- **2019-02-21** Added as Chief Co-Sponsor Sen. Bill Cunningham
- **2019-02-27** Assigned to Revenue `referral-committee`
- **2019-02-27** Added as Chief Co-Sponsor Sen. Don Harmon
- **2019-03-05** Added as Co-Sponsor Sen. Julie A. Morrison
- **2019-03-05** Added as Co-Sponsor Sen. Laura M. Murphy
- **2019-03-06** Added as Co-Sponsor Sen. Chuck Weaver
- **2019-03-06** Postponed - Revenue
- **2019-03-13** Postponed - Revenue
- **2019-03-22** Rule 2-10 Committee Deadline Established As March 28, 2019
- **2019-03-27** Do Pass Revenue; 007-000-000 `committee-passage`
- **2019-03-27** Placed on Calendar Order of 2nd Reading March 28, 2019
- **2019-04-03** Second Reading `reading-2`
- **2019-04-03** Placed on Calendar Order of 3rd Reading April 4, 2019
- **2019-04-04** Added as Co-Sponsor Sen. Napoleon Harris, III
- **2019-04-05** Senate Floor Amendment No. 1 Filed with Secretary by Sen. Elgie R. Sims, Jr. `amendment-introduction`
- **2019-04-05** Senate Floor Amendment No. 1 Referred to Assignments `referral-committee`
- **2019-04-05** Senate Floor Amendment No. 2 Filed with Secretary by Sen. Elgie R. Sims, Jr. `amendment-introduction`
- **2019-04-05** Senate Floor Amendment No. 2 Referred to Assignments `referral-committee`
- **2019-04-08** Added as Co-Sponsor Sen. William E. Brady
- **2019-04-09** Senate Floor Amendment No. 1 Assignments Refers to Revenue
- **2019-04-09** Senate Floor Amendment No. 2 Assignments Refers to Revenue
- **2019-04-10** Added as Co-Sponsor Sen. Chapin Rose
- **2019-04-10** Senate Floor Amendment No. 1 Recommend Do Adopt Revenue; 008-000-000
- **2019-04-10** Recalled to Second Reading `reading-2`
- **2019-04-10** Senate Floor Amendment No. 1 Adopted; Sims `amendment-passage`
- **2019-04-10** Placed on Calendar Order of 3rd Reading
- **2019-04-10** Third Reading - Passed; 056-000-000 `reading-3, passage`
- **2019-04-10** Senate Floor Amendment No. 2 Tabled Pursuant to Rule 5-4(a) `amendment-failure`
- **2019-04-10** Added as Co-Sponsor Sen. John F. Curran
- **2019-04-11** Arrived in House `introduction`
- **2019-04-11** Chief House Sponsor Rep. Michael J. Zalewski
- **2019-04-11** Added Alternate Chief Co-Sponsor Rep. Charles Meier
- **2019-04-11** First Reading `reading-1`
- **2019-04-11** Referred to Rules Committee `referral-committee`
- **2019-04-30** Assigned to Revenue & Finance Committee `referral-committee`
- **2019-05-08** Added Alternate Chief Co-Sponsor Rep. Jay Hoffman
- **2019-05-09** To Income Tax Subcommittee
- **2019-05-10** Rule 19(a) / Re-referred to Rules Committee `referral-committee`
- **2019-05-20** Assigned to Revenue & Finance Committee `referral-committee`
- **2019-05-20** Final Action Deadline Extended-9(b) May 31, 2019
- **2019-05-21** House Committee Amendment No. 1 Filed with Clerk by Rep. Mark L. Walker `amendment-introduction`
- **2019-05-21** House Committee Amendment No. 1 Referred to Rules Committee `referral-committee`
- **2019-05-21** Motion Filed to Suspend Rule 21 Revenue & Finance Committee; Rep. Natalie A. Manley
- **2019-05-21** Motion to Suspend Rule 21 - Prevailed
- **2019-05-21** House Committee Amendment No. 1 Rules Refers to Revenue & Finance Committee
- **2019-05-22** House Committee Amendment No. 1 Adopted in Revenue & Finance Committee; by Voice Vote `amendment-passage`
- **2019-05-22** Do Pass as Amended / Short Debate Revenue & Finance Committee; 015-000-000 `committee-passage`
- **2019-05-22** Placed on Calendar 2nd Reading - Short Debate
- **2019-05-22** Alternate Chief Sponsor Changed to Rep. Mark L. Walker
- **2019-05-22** Added Alternate Chief Co-Sponsor Rep. Joe Sosnowski
- **2019-05-22** Second Reading - Short Debate `reading-2`
- **2019-05-22** Held on Calendar Order of Second Reading - Short Debate `reading-2`
- **2019-05-22** Added Alternate Chief Co-Sponsor Rep. Michael J. Zalewski
- **2019-05-23** Chief Sponsor Changed to Sen. Ann Gillespie
- **2019-05-24** Added Alternate Co-Sponsor Rep. Katie Stuart
- **2019-05-24** Added Alternate Co-Sponsor Rep. Natalie A. Manley
- **2019-05-24** Added Alternate Co-Sponsor Rep. Terra Costa Howard
- **2019-05-24** Added Alternate Co-Sponsor Rep. Dan Ugaste
- **2019-05-24** Added Alternate Co-Sponsor Rep. David McSweeney
- **2019-05-24** Added Alternate Co-Sponsor Rep. Karina Villa
- **2019-05-24** Added Alternate Co-Sponsor Rep. Michelle Mussman
- **2019-05-24** Added Alternate Co-Sponsor Rep. Monica Bristow
- **2019-05-24** Added Alternate Co-Sponsor Rep. Nathan D. Reitz
- **2019-05-24** Added Alternate Co-Sponsor Rep. Mary Edly-Allen
- **2019-05-24** Added Alternate Co-Sponsor Rep. Joyce Mason
- **2019-05-24** Added Alternate Co-Sponsor Rep. Lance Yednock
- **2019-05-24** Added Alternate Co-Sponsor Rep. Daniel Didech
- **2019-05-24** Added Alternate Co-Sponsor Rep. Martin J. Moylan
- **2019-05-27** Placed on Calendar Order of 3rd Reading - Short Debate
- **2019-05-27** Third Reading - Short Debate - Passed 114-000-000 `reading-3, passage`
- **2019-05-27** Added Alternate Co-Sponsor Rep. Deanne M. Mazzochi
- **2019-05-27** Added Alternate Co-Sponsor Rep. Grant Wehrli
- **2019-05-27** Added Alternate Co-Sponsor Rep. Thomas M. Bennett
- **2019-05-27** Added Alternate Co-Sponsor Rep. Mark Batinick
- **2019-05-28** Secretary's Desk - Concurrence House Amendment(s) 1
- **2019-05-28** Placed on Calendar Order of Concurrence House Amendment(s) 1 - May 29, 2019
- **2019-05-28** House Committee Amendment No. 1 Motion to Concur Filed with Secretary Sen. Ann Gillespie `filing`
- **2019-05-28** House Committee Amendment No. 1 Motion to Concur Referred to Assignments `referral-committee`
- **2019-05-28** Added as Chief Co-Sponsor Sen. Pat McGuire
- **2019-05-29** House Committee Amendment No. 1 Motion to Concur Assignments Referred to Revenue `referral-committee`
- **2019-05-29** House Committee Amendment No. 1 Motion To Concur Recommended Do Adopt Revenue; 009-000-000
- **2019-05-29** House Committee Amendment No. 1 Senate Concurs 057-000-000
- **2019-05-29** Senate Concurs
- **2019-05-29** Passed Both Houses
- **2019-06-06** Sent to the Governor `executive-receipt`
- **2019-08-02** Governor Approved `executive-signature`
- **2019-08-02** Effective Date August 2, 2019
- **2019-08-02** Public Act . . . . . . . . . 101-0207 `became-law`
## Source
OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/087f384b-bd45-4e07-9904-dae91cf10037`. Confidence: reported (aggregated from official Illinois legislature records).