Section 72711 Of Article 2. Inclusion Proceedings Initiated By The Board From California Water Code >> Division 20. >> Part 11. >> Chapter 1. >> Article 2.

. Any action or proceeding in which the validity of an annexation to an improvement district pursuant to this article is contested, questioned, or denied shall be commenced within three months after the date of the resolution of the board approving the annexation of the territory to an improvement district; otherwise, the annexation shall be held valid and in every respect legal and incontestable.