California Constitution Article X § 6 – The right to collect rates or compensation for the use of water …
The right to collect rates or compensation for the use of water supplied to any county, city and county, or town, or the inhabitants thereof, is a franchise, and cannot be exercised except by authority of and in the manner prescribed by law.
(Sec. 6 added June 8, 1976, by Prop. 14. Res.Ch. 5, 1976.)