Illinois SB 3603: CONSUMERS–DATA PROCESSING

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104TH GENERAL ASSEMBLY 
State of Illinois 
2025 and 2026
SB3603

Introduced 2/5/2026, by Sen. Steve Stadelman 

SYNOPSIS AS INTRODUCED:

815 ILCS 505/2MMMM new

 Amends the Consumer Fraud and Deceptive Business Practices Act. Provides that a consumer may opt out of the processing of personal data for the purpose of targeted advertising by submitting a request using the methods specified in a data processing controller's privacy notice. Sets forth the requirements of a controller's privacy notice. Provides that, if a controller processes personal data for purposes of targeted advertising or sells personal data to third parties for targeted advertising, the controller shall disclose the processing or sale in a privacy notice and provide access to a clear and conspicuous method outside the privacy notice for a consumer to opt out of the processing or sale. Makes other changes. Effective January 1, 2028.

LRB104 19802 SPS 33252 b

A BILL FOR

SB3603LRB104 19802 SPS 33252 b

1 AN ACT concerning business.

2 Be it enacted by the People of the State of Illinois, 

3represented in the General Assembly:

4 Section 5. The Consumer Fraud and Deceptive Business 

5Practices Act is amended by adding Section 2MMMM as follows:

6 (815 ILCS 505/2MMMM new)

7 Sec. 2MMMM. Data processing. 

8 (a) Definitions. As used in this Section:

9 "Controller" means the natural or legal person who, alone 

10or jointly with others, determines the purposes and means of 

11the processing of personal data.

12 "Deidentified data" means data that cannot reasonably be 

13used to infer information about, or otherwise be linked to, an 

14identified or identifiable individual, or a device linked to 

15such an individual.

16 "Identified or identifiable individual"