Water Code § 23902
CHAPTER 3.5. Alternative Provisions for the Formation of Improvement Districts and the Issuance of Bonds Therefor
Bonds of a district for an improvement district may be issued for either the purpose of cooperating and contracting with the United States pursuant to the Irrigation District Federal Cooperation Law as contained in Chapter 2 (commencing with Section 23175) of Part 6 of Division 11, or for any of the other purposes specified in Section 23900.