California Code, Public Resources Code - PRC § 4585

(a) Within one month after completion of the work described in the timber harvesting plan or nonindustrial timber harvest notice, excluding work for stocking, site preparation, or maintenance of drainage facilities and soil stabilization treatments on skid trails, roads, and landings after the plan period, a report shall be filed by the timber owner or the owner's agent with the department that all work, except stocking, site preparation, or maintenance of drainage facilities and soil stabilization treatments, has been completed.

(b) If all of the work described in the plan has not been completed, a report may be filed annually with respect to a portion of the area covered by the plan which has been completed. The portion completed shall be adequately identified on a map submitted with the report.