Assembly Bill 1564 (Ahrens), sponsored by the Peace Officers Research Association of California, protects confidential communications between public sector union representatives and their members relating to matters within the scope of representation. The legislation codifies longstanding Public Employment Relations Board precedents, including William S. Hart Union High School District (2018) PERB Decision No. 2595 and County of Merced (2014) PERB Decision No. 2361-M.
The bill establishes that it is an unfair labor practice for a public employer to question a public employee, a representative of a recognized employee organization, or an exclusive representative regarding communications made in confidence between an employee and the representative in connection with representation relating to any matter within the scope of the recognized employee organization’s representation. This protection covers grievances, disciplinary proceedings, and working conditions. The bill has been previously introduced in prior sessions as AB 340 and AB 2421.
On March 18, 2026, David E. Mastagni of Mastagni Holstedt testified before the the Assembly Committee on Public Employment and Retirement, which advanced ABl 1564 with bipartisan support. During his testimony, David responded directly to critics of the bill explaining the bill safeguards only those secondhand representational discussions that possess no legitimate evidentiary value yet serve only to chill protected activity and invade the essential trust in the representation relationship. The narrowly tailored legislation does not even create a new evidentiary privilege under the Evidence Code.
Rather, he explained, it applies solely to public employers, and its violations are enforceable only as unfair labor practices through the Public Employment Relations Board. The protections do not extend to criminal investigations and does not supersede Government Code Section 3303. Public employers remain free to question any percipient witness about the facts of an incident or firsthand observations.
Critics, including certain school administrators and local government employers, have suggested that the bill would hinder workplace investigations or conflict with obligations such as those arising under AB 218, which extends time for childhood sexual assault victims to file civil claims. These concerns are unfounded. AB 218 addresses statutes of limitations in civil litigation and does not dictate or restrict legitimate investigative tactics. Public employers, including schools, may still interview any witnesses who possess firsthand knowledge of alleged events, ensuring that investigations remain robust and thorough.
AB 1564 protects only representation-related communications, such as pre-interview advice or grievanc strategy discussions between an employee and union representative. Compelling disclosure of such secondhand information would unlawfully deputize union representatives to impeach their own members, eroding the core functions of employee organizations and undermining employee willingness to seek candid guidance.
California public employees deserve the assurance that they can communicate fully and frankly with their union representatives without fear of employer intrusion. The measure strengthens the foundational trust between public employees, their unions, and their employers while preserving legitimate investigative authority where it truly matters.
Mastagni Holstedt, APC is proud to have assisted in the drafting of this important legislation and will continue to monitor the progress of AB 1564 closely as it moves through the legislative process. This bill represents a significant step forward in reinforcing the protection of representation rights in California.
