Cal. RTC § 2263.2

After the effective date of this section the formation of a special district shall not be effective for property tax purposes unless a maximum property tax rate has been established by the voters of the district pursuant to the provisions of Article 6 (commencing with Section 2285) provided, however, that the maximum property tax rate for a maintenance district formed pursuant to the Improvement Act of 1911 or the Municipal Improvement Act of 1913 may be established prior to or concurrently with the formation of such district by any petition or by supplemental written consent executed by property owners holding at least 60 percent in area of the land to be benefited. The procedures for such petition or supplemental written consent shall follow the procedures provided in the Majority Protest Act of 1931.