CA AB2421

Prohibits public employers (local agencies, state, judicial, school, higher education, and transit districts) from questioning employees or representatives about confidential communications between employees and their union representatives regarding matters within the scope of representation.

Establishes that communications between an employee and their representative are not confidential if the representative was a witness or party to events forming the basis of a potential administrative disciplinary or criminal investigation.

Clarifies that this bill does not create an evidentiary privilege but prevents public employers and their agents from compelling disclosure of confidential communications to third parties.

Applies to multiple labor relations statutes including the Meyers-Milias-Brown Act, the Ralph C. Dills Act, judicial employee provisions, public school provisions, higher education provisions, and provisions for various public transit districts.

Does not supersede existing whistleblower or other investigative protections, and maintains that confidentiality protections do not extend to criminal investigations.