Education Code § 18311
ARTICLE 2. Unified School Districts
As used in this chapter the words “union high school district” mean union high school district or unified school district and the words “union high school” mean union high school or unified school district. Whenever the provisions of this chapter are being exercised by, or are being made applicable in, a unified school district, the words “union high school district” and “union high school” shall be deemed to mean unified school district.