The elections official shall cause a ballot pamphlet concerning the proposed boundary change to be printed and mailed to each qualified elector in the territory proposed to be transferred.
The ballot pamphlet shall contain the following in the order prescribed:
The elections official shall mail a ballot pamphlet to each qualified elector at least 10 days prior to the date of the election. The ballot pamphlet is "official matter" within the meaning of Section 13303 of the Elections Code.
Ca. Gov. Code § 23274