Cal. Lab. Code § 1160.3
The testimony taken by such member, agent, or agency, or the board in such hearing shall be reduced to writing and filed with the board. Thereafter, in its discretion, the board, upon notice, may take further testimony or hear argument. If, upon the preponderance of the testimony taken, the board shall be of the opinion that any person named in the complaint has engaged in or is engaging in any such unfair labor practice, the board shall state its findings of fact and shall issue and cause to be served on such person an order requiring such person to cease and desist from such unfair labor practice, to take affirmative action, including reinstatement of employees with or without backpay, and making employees whole, when the board deems such relief appropriate, for the loss of pay resulting from the employer's refusal to bargain, and to provide such other relief as will effectuate the policies of this part. Where an order directs reinstatement of an employee, backpay may be required of the employer or labor organization, as the case may be, responsible for the discrimination suffered by the employee. Such order may further require such person to make reports from time to time showing the extent to which it has complied with the order. If, upon the preponderance of the testimony taken, the board shall be of the opinion that the person named in the complaint has not engaged in or is not engaging in any unfair labor practice, the board shall state its findings of fact and shall issue an order dismissing the complaint. No order of the board shall require the reinstatement of any individual as an employee who has been suspended or discharged, or the payment to the employee of any backpay, if such individual was suspended or discharged for cause. In case the evidence is presented before a member of the board, or before an administrative law officer thereof, such member, or such administrative law officer, as the case may be, shall issue and cause to be served on the parties to the proceedings a proposed report, together with a recommended order, which shall be filed with the board, and, if no exceptions are filed within 20 days after service thereof upon such parties, or within such further period as the board may authorize, such recommended order shall become the order of the board and become effective as therein prescribed. If exceptions have been filed and the board issues an order finding that the person named in the complaint has engaged in or is engaging in any unfair labor practice and directing payment of a monetary remedy, the board shall order further proceedings to determine the specific amount of the monetary remedy or, if the monetary remedy is continuing to accrue, the amount accrued as of the date of the board's order. In these cases, the board's order does not become final for purposes of Section 1160.8 until the board has issued its determination of the specific amount of the monetary remedy.
Until the record in a case shall have been filed in a court, as provided in this chapter, the board may, at any time upon reasonable notice and in such manner as it shall deem proper, modify or set aside, in whole or in part, any finding or order made or issued by it.
Ca. Lab. Code § 1160.3