California Code, Government Code - GOV § 8187

No action attacking or otherwise questioning the validity of any redevelopment plan or any adoption or incorporation of any document into the redevelopment plan as provided in subdivision (a) of Section 8183, or any findings or determinations of the authority in connection with such plan shall be brought prior to the adoption of the redevelopment plan nor at any time after the elapse of 60 days from the date of adoption of the resolution adopting the plan or any document.

An action may be brought pursuant to Chapter 9 (commencing with Section 860) of Title 10 of Part 2 of the Code of Civil Procedure to determine the validity of bonds and the redevelopment plan to be financed or refinanced, in whole or in part, by the bonds, or to determine the validity of a redevelopment plan not financed by bonds, including, but not limited to, the validity of any document adopted or incorporated into the redevelopment plan, or the legality and validity of all proceedings taken and (as provided in the bond resolution) proposed to be taken for the authorization, issuance, sale, and delivery of the bonds and for the payment of the principal thereof and interest thereon.