242.450.  Organization of commissioners — duties of secretary of board of supervisors — additional tax levy, when. — 1.  After the list of lands, and other property, with the assessed benefits and the decree and judgment of court, have been filed in the office of the county recorder as provided in section 242.280, then the board of supervisors shall without any unnecessary delay, levy a tax of such portion of said benefits on all lands, railroad and other property in the district to which benefits have been assessed, as may be found necessary by the board of supervisors to pay the costs of the completion of the proposed works and improvements as shown in said plan for reclamation and in carrying out the objects of said district, and plus ten percent of said total amount for emergencies.  The tax shall be apportioned to and levied on each tract of land or other property in said district in proportion to the benefits assessed and not in excess thereof.

  2.  Notwithstanding the limitations of sections 242.280 and 242.290 or any tax levy limitation contained in this chapter, the board of supervisors, having levied a tax pursuant to paragraph 1 of this section, may levy a new tax of such portion of the assessed benefits on all lands, railroad and other property in the district to which benefits have been assessed whenever it is found necessary by the board of supervisors to pay the cost of replacing, repairing and reconstructing drainage works and improvements called for and completed pursuant to the plan for reclamation originally adopted by the board of supervisors and in carrying out the objects of said district.  The tax levied under this paragraph shall be apportioned to and levied on each tract of land or other property in said district in proportion to the benefits assessed.

  3.  In case bonds are issued as provided herein and hereafter, then the amount of the interest, as estimated by said board of supervisors, which will accrue on such bonds shall be included and added to the tax levied under either paragraph 1 or 2 of this section, but the interest to accrue on account of the issuing of said bonds shall not be construed as a part of the costs of construction in determining whether or not the expenses and costs of making said improvements are or are not equal to or in excess of the benefits assessed.

  4.  The secretary of the board of supervisors, as soon as and whenever said total tax is levied, shall, at the expense of the district, prepare a list of all taxes levied, in the form of a well-bound book, which book shall be endorsed and named "Drainage Tax Record of ______ Drainage District ______", which endorsement shall also be printed or written at the top of each page in said book, and shall be signed and certified by the president and secretary of the board of supervisors, attested by the seal of the district, and the same shall thereafter become a permanent record in the office of said secretary.