California Code, Education Code - EDC § 88028

When compensatory time off is authorized in lieu of cash compensation, such compensatory time off shall be granted within 12 calendar months following the month in which the overtime was worked and without impairing the services rendered by the employing district.

This section shall apply to districts that have adopted the merit system in the same manner and effect as if it were a part of Article 3 (commencing with Section 88060) of this chapter.