New California Law Requires Diversity on Corporate Boards of Directors By James A. Patton Jr. & Tracie L. Childs on October 15, 2020 Email this postTweet this postLike this postShare this post on LinkedIn On September 30, 2020, Governor Gavin Newsom signed into law Senate Bill (SB) 979, a measure that will require publicly held corporations in California to achieve diversity on their boards of directors by January 2023.