Cal. Pub. Res. Code § 5545.3

In the event the board of directors proposes to submit a special tax, as provided in Section 50077 of the Government Code, and a bond issue for approval by the voters of the district, or a zone or zones within the district, both the special tax and the bond issue may be consolidated and may appear on the ballot as a single proposition if the special tax and the bond issue are for the same object or purpose.