Cal. Unemployment Insurance Code § 1052

Upon receipt of the application the separate account, actual contribution and benefit experience and payrolls of the predecessor or that part thereof, as determined by authorized regulations, which pertains to the organization, trade, or business, or portion thereof acquired, shall be transferred to the successor employer for the purpose of determining its rate of contribution after the acquisition with the same effect for that purpose as if the operations of the predecessor had at all times been carried on by the successor. The separate account shall be transferred by the director to the successor employer and, as of the date of the acquisition, shall become the separate account or part of the separate account, as the case may be, of the successor employer, and the benefits thereafter chargeable to the predecessor employer on account of employment relating to the transferred organization, trade, or business or transferred portion thereof prior to the date of the acquisition shall be charged to the separate account. This section shall not apply to any acquisition which is determined by the director to have been made for the purpose of obtaining a more favorable rate of contributions under Section 977.