This bill was about Global Privacy Control (GPC) [1], which sites and mobile apps are required to respect under the California Consumer Privacy Act. The law is enforced by the Office of the California Attorney General [2]. There is a draft specification at the W3C [3].

Disclosure: I am one of the co-founders of GPC and a spec editor.

[1] https://globalprivacycontrol.org/.

[2] https://oag.ca.gov/news/press-releases/attorney-general-bont....

[3] https://privacycg.github.io/gpc-spec/.