On October 2, 2026, the California Office of Administrative Law approved emergency regulations issued by California’s Office of Health Care Affordability (OHCA) to implement Assembly Bill (AB) 1415 and significantly expand California’s healthcare transaction notice regime. The regulations, which will become effective on November 2, 2026, implement new reporting requirements for management services organizations (MSOs), private equity (PE) groups, hedge funds, and other “noticing entities.” They also establish new reporting triggers for certain PE, MSO, and healthcare real estate transactions and expand the information parties must provide to OHCA.