California Code, Public Utilities Code - PUC § 935

(a) As part of each annual report, including any updates pursuant to subdivision (e) of Section 934, and in each general rate case application, each electrical corporation shall include a detailed analysis of its current qualified staffing level and future required qualified staffing level for each job classification needed to be consistent with the findings and achieve the policies and requirements of this article.

(b) The commission shall require each electrical corporation to have adequate qualified staffing needed to be consistent with the findings and achieve the policies and requirements of this article.

(c) For job classifications that have apprentice training requirements, the commission shall require each electrical corporation to maintain a pipeline of apprentices sufficient to meet future qualified staffing needs, subject to any limitations based on safe staffing ratios.