Cal. Health & Safety Code § 1267.61
(a) At least 90 days prior to a finalization of the sale, transfer of operation, including management changes, assignment, lease, or other change or transfer of ownership interests, the licensee of a facility defined in subdivision (c) of Section 1250, excluding skilled nursing facilities that are operated as a distinct part of an acute care hospital, shall give a written notice of the proposed change in licensee or management company to all residents of the facility and their representatives that contains all of the following information applicable to the proposed change: