Code of Civil Procedure section 349.2
(1)
The validity of any such acts or proceedings for the authorization of bonds shall not be contested in any action unless such action shall have been brought within six months from the date of election authorizing said bonds, in cases where said bonds are required by law to be authorized at an election, or within six months from the date of adoption of a resolution or ordinance authorizing such bonds, in cases where bonds are not required by law to be authorized at an election;(2)
The validity of any such acts or proceedings for the sale of bonds (including all acts or proceedings taken prior thereto and providing for the issuance of such bonds) shall not be contested in any action unless such action shall have been brought within six months from the date of sale of said bonds;(3)
The validity of any such acts or proceedings for the issuance and delivery of, or payment for, bonds shall not be contested in any action unless such action shall have been brought within six months from the date of issuance and delivery of, or payment for, said bonds.
Source:
Section 349.2, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=CCP§ionNum=349.2.
(accessed May 4, 2025).