California Code, Streets and Highways Code - SHC § 5500

If any assessment heretofore or hereafter made, issued or filed in the office of the clerk is void or unenforceable for any cause or if bonds have been or are issued to represent or be secured by any assessments and such issuance was or is not effective through the curative provisions in relation thereto, or any curative act that may be passed by the Legislature in relation thereto to make them valid and enforceable, then, in any of such events a reassessment therefor may be issued.  A reassessment may be made upon the initiative of the legislative body.