California Code, Public Utilities Code - PUC § 102204

Except as otherwise provided in this part, district elections shall be called, held, and conducted as provided by law for county elections.  Except in cases of emergency or compelling public need, as determined by the district, district elections, including those held pursuant to Article 7 (commencing with Section 102330) or Article 8 (commencing with Section 102350), or Article 1 (commencing with Section 102500) of Chapter 7, shall be held and consolidated with city, county, or state elections, or any election held under the Uniform District Election Law (Part 4 (commencing with Section 10500) of Division 10 of the Elections Code).