9FCENSUS9F.1Federal and state cooperation.The secretary of state is authorized, so far as practicable, to cooperate with the census bureau of the United States in the gathering, compilation, and publication of census statistics.[S13, §177-a; C24, 27, 31, 35, 39, §424; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §26.1]86 Acts, ch 1245, §1978C93, §9F.19F.2Federal census.The secretary of state shall, whenever a general census is taken by the federal government, procure from the supervisor of such census, or other proper federal official, a copy of such part of said census as gives the population of the state of Iowa by counties, by townships, and by cities, and file the same in the secretary of state’s office and attach thereto, dated and signed by the secretary, a certificate that the same is the census report furnished by said federal official.[S13, §177-c; C24, 27, 31, 35, 39, §425; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §26.2]C93, §9F.29F.3Certification.When certified by the secretary of state the census shall be in full force and effect throughout the state. [S13, §177-c; C24, 27, 31, 35, 39, §426; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §26.3; 81 Acts, ch 29, §1]C93, §9F.32021 Acts, ch 142, §319F.4Publication — official register.The legislative services agency may publish the federal census report in each copy of the Iowa official register as provided in section 2A.5.[S13, §177-c; C24, 27, 31, 35, 39, §427; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §26.4]C93, §9F.498 Acts, ch 1119, §25; 98 Acts, ch 1164, §40; 2003 Acts, ch 35, §24, 48, 499F.5Evidence.The certified census records in the office of the secretary of state shall be competent evidence of all matters therein contained.[S13, §177-c; C24, 27, 31, 35, 39, §428; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §26.5]C93, §9F.52003 Acts, ch 35, §25, 499F.6Population of counties, townships and cities.Whenever the population of any county, township or city is referred to in any law of this state, it shall be determined by the last preceding certified federal census unless otherwise provided. Whenever a special federal census is taken by any city, the mayor and council shall certify the census as soon as possible to the secretary of state and to the treasurer of state as otherwise herein provided, and upon the failure to do so, the treasurer of state shall, after six months from the date of the special census, withhold allocation from the state to the city of any moneys the amount of which is based on the population of the city, and shall continue to do so until such time as certification by the mayor and council is made, or until the next decennial federal census. If there be a difference between the original certified record in the office of the secretary of state and the published census the former shall prevail.[C97, §177; S13, §177-c; C24, 27, 31, 35, 39, §429; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §26.6]C93, §9F.6Similar provision, §4.1(22)