Cal. Elec. Code § 9050

After the Secretary of State determines that a measure will appear on the ballot at the next statewide election, the Secretary of State shall promptly transmit a copy of the measure to the Attorney General. The Attorney General shall provide and return to the Secretary of State a ballot title and summary and ballot label for each measure submitted to the voters of the whole state by a date sufficient to meet the ballot pamphlet public display deadlines.