California Code, Health and Safety Code - HSC § 55009

Any bonds issued by the local agency under the provisions of this division, their transfer, and the income therefrom shall at all times be free from all direct and indirect taxation of every kind by the state, including all taxes imposed pursuant to Part 11 (commencing with Section 23001) of Division 2 of the Revenue and Taxation Code and imposed by cities, counties, cities and counties, or other political subdivisions of this state, except inheritance and gift taxes.