Here’s the extent of the design constraints by the bill:

(b) (1) A business shall not develop or maintain a mobile operating system that does not include a setting that enables a consumer to send an opt-out preference signal to businesses with which the consumer interacts through the mobile operating system.

(2) This subdivision shall become operative six months after the adoption of regulations by the California Privacy Protection Agency that outline the requirements and technical specifications for an opt-out preference signal to be used by a mobile operating system.

(c) The California Privacy Protection Agency may adopt regulations as necessary to implement and administer this section, including, but not limited to, ensuring that the setting described by subdivision (a) is easy for a reasonable person to locate and configure and updating the definitions of “browser” and “mobile operating system” to address changes in technology, data collection, obstacles to implementation, or privacy concerns.

It has to:

1. exist
2. be a setting
3. that people interact with through the operating system
4. Be reasonably easy to locate and change

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idk guys, seems pretty difficult to me /s