California Code, Unemployment Insurance Code - UIC § 2707.2

(a) The department shall consider the facts submitted by the employer pursuant to Section 2707.1 and make a determination as to the eligibility of the claimant for benefits. The department shall promptly notify the claimant of the determination and the reasons therefor. The claimant may appeal therefrom to an administrative law judge within 30 days from service of the notice of determination. The 30-day period may be extended for good cause. The director shall be an interested party to any appeal.

(b) “Good cause,” as used in this section, shall include, but not be limited to, mistake, inadvertence, surprise, or excusable neglect.

(c) This section shall become operative on March 1, 2018.