Cal. Unemp. Ins. Code § 1272.5

If an individual fails to submit for any week during a period of training or retraining the certification required by Section 1272, he or she shall be ineligible to receive any benefits for that week. This section shall not render an individual ineligible for benefits for any week during the period of training or retraining if on or before Monday of that week he or she notifies the department that his or her training or retraining course of instruction has been or is being discontinued or terminated prior to that week.