The board of directors of any irrigation district organized under the provisions of this act shall commence special proceedings in and by which the proceedings of said board and of said district providing for and authorizing the issue and sale of the bonds of said district, whether said bonds or any of them have or have not been sold or disposed of, or in and by which the proceedings of said board and of said district providing for the authorization of contract with the United States may be judicially examined, approved and confirmed. Such proceedings shall be brought within sixty days after the adoption of resolution by the board declaring that the bond election or election for the authorization of the execution of contract with the United States has been voted upon favorably by the electorate of the district. The board may, however, in its discretion, bring an action prior to the time specified, whereby the validity of the organization of the district or of any steps leading to the issuance of bonds or to the making of contract as aforesaid, may be separately judicially examined, approved and confirmed. Within sixty days after the ascertainment of the rate or percentage of drainage benefits, and of the award for damages inflicted by drainage works, as in this act provided, the board shall bring a similar special proceeding, whereby such assessment and award may be judicially examined, approved and confirmed. In the event of the inclusion by any irrigation district of additional lands, or the exclusion of lands previously within the boundaries of any such district, the board of directors may, if they deem it advisable so to do, institute a special proceeding in like manner and with like effect as herein provided for the confirmation of bonds, whereby the proceedings for such change of boundaries may be judicially examined, approved and confirmed.