California Code, Education Code - EDC § 23006

(a) If a county superintendent of schools or employing agency or school district or community college district that reports directly to the system, submits monthly reports, as specified by Section 23004, late, as defined in Section 23005, or in unacceptable form, the board shall, in accordance with regulations, assess penalties.

(b) The board shall, in accordance with regulations, assess penalties, based on the sum of the employer and employee contributions required under this part by the report, for late or unacceptable submission of reports, at a rate of interest equal to the regular interest rate.